SPS

Every time that we cruise, I know what the daily "break even" point is for the two of us.
A few times I have "made up the difference" when my wife has a light day of drinking! 😆

I have not ever encountered people so intoxicated that they cause the most troubling of the issues you are referring to; anger and fighting. Some loudness and a bit of obnoxiousness, sure. Asking to not encounter intoxicated people on a cruise (or any other vacation destination, for that matter) is just not feasible. 
And I must agree with @Zacharius . I think that only a VERY small percentage of us that buy the DBP cause such issues. Even without it, those personality types would still be inclined to drink in excess because once inhibitions are lowered, spending habits also tend to loosen up.
Are you counting how many drinks another guest ordered or was that just overheard? That seems like time that could be better spent doing something more enjoyable on your vacation.

At the cabin prices I just saw today? Not anytime soon! 😵
I guess I'll wait it out for a while.

@Censored Well I tell ya, I am a Recovering Alcoholic. One of the ones who goes looking for the "Friends of Bill" meetings when I am on board. I have cruised both before and after I became sober and, when I was drinking, I cruised both with and without the DBP.
I can assure you cost of the drink had absolutely nothing to do with how much I drank or weather or not I got "drunk and obnoxious". The only thing having the DBP did for me was allowed me to get my drunk on without the worry of what my wife would say when we got the balance sheet being charged to our card on the last night. The getting drunk part was a foregone conclusion.
These days I call and get the DBP for my wife and I get the Refreshment package. You can do that if you call and tell them why. (Yes, I am in recovery and my wife drinks, it happens all the time)  The DBP makes it easy and we don't worry about when or how many Margarita's she can have or how it will impact that balance sheet. We get on the ship and don't worry about anything till we pick up our luggage when we disembark. 
It's called "Being on vacation" you might have heard of it.
 
Oh just a reminder..... your first post had nothing to do with the DBP..

Welp, there's only one way to find out. FULL SPEED AHEAD!

I actually think the drink limit might be WHY Carnival has this issue. One thing I've seen over and over with people who get the DBP on Royal is that they love the freedom to try a new drink (beer, wine or cocktail) and if they don't like it, they can just not finish it. BUT I'd imagine with drink limits people wouldn't want to "waste" a "slot" so they would be more likely to finish every drink they get AND maybe even feel challenged to meet that 15-drink limit every day.
Just a thought.

At the cabin prices I just saw today? Not anytime soon! 😵
I guess I'll wait it out for a while.

At the cabin prices I just saw today? Not anytime soon! 😵
I guess I'll wait it out for a while.

I have never cruised. It never seemed like my kind of vacation. I signed up for one because some friends are going and I really enjoy hanging out with them. We make our own fun. We also enjoy a drink.
My friend group is the #1 reason I want to go on this cruise. The unlimited drinks package is the #2 reason. I would still go without the drink package, but I wouldn't be as giddy about it.
I don't plan to get drunk on my trip. I learned in high school that drinking too much makes me feel bad, and I don't want to waste my vacation feeling bad.
If I have a good time, the drinks package might be the reason I come back for a second cruise. So RCI may want to hang onto that.

At the cabin prices I just saw today? Not anytime soon! 😵
I guess I'll wait it out for a while.

At the cabin prices I just saw today? Not anytime soon! 😵
I guess I'll wait it out for a while.

Okay..I'm finally gonna do it..
@Censored...I've seen you at the helm of quite a lot of topics, which, at least to me, seem like "controversial" topics and I have to ask...why? Like...are you just looking for a place to vent your opinions? Are you trying to get under people's skins? Are you after conversation/discussion/ new view points? I'm genuinely curious...

I have not ever encountered people so intoxicated that they cause the most troubling of the issues you are referring to; anger and fighting. Some loudness and a bit of obnoxiousness, sure. Asking to not encounter intoxicated people on a cruise (or any other vacation destination, for that matter) is just not feasible. 
And I must agree with @Zacharius . I think that only a VERY small percentage of us that buy the DBP cause such issues. Even without it, those personality types would still be inclined to drink in excess because once inhibitions are lowered, spending habits also tend to loosen up.
Are you counting how many drinks another guest ordered or was that just overheard? That seems like time that could be better spent doing something more enjoyable on your vacation.

And if they do become a problem, I am confident the ship has protocols in place to deal with the matter.

Some people just like to get into other people's business. 
I have seen very few people who were drunk to the point of being a problem 

Did you stay in the hot tub after hearing that? More than likely Mr. 21 Drinks hasn't left it all day so....ew.

Seems the title was classic click bait so people would read the post. Strange axe to grind but everyone is entitled to their opinions. Other fun tags to get your post viewed next time "Royal Caribbean going out of Business" or "Coco Cay suffers the fate of Atlantis and sinks beneath the waves."

...wait but what does all of that have to do with stopping the unlimited drink plan....?

I would wager that 99% of people using the UDP are perfectly calm, quiet, responsible people who are just enjoying their vacation. Maybe they get a little loud and rambunctious at night, but they probably would without the UDP anyways. I can only imagine what small percentage of UDP customers are causing issues. 

If you buy a beverage package online in the Cruise Planner, an additional 18% for gratuities will be added to the total price at checkout.
 

I hear they've got just the right guy for the job.

I hear they've got just the right guy for the job.