I guess if you want to spend your whole trip being nice to other guests, go for it. Personally, my only concern when I am on a $3000 vacation is the enjoyment of myself and the people I am with. Your comparisons don't make a lot of sense to me. I wouldn't pool hop, because I am not paying for whatever pool I might be hopping to (and it just seems annoying to travel to swim at another resort). I wouldn't smoke (if I was a smoker, which I am not, but have traveled with one) in a non-smoking area. I wouldn't line cut because line rules are first come, first serve. The same as the ADR line.
The difference is, you are paying for that pool at your hotel. It is clearly posted that you are not allowed to smoke on the balcony and if it is not posted then it is presumed to be allowed. Line cutting is a weird comparison. I am pretty sure line cutting is not allowed but common sense says first come first serve. Just like ADRs.
If multiple ADRs were such a big problem, Disney would strictly forbid it or require cc deposits (something I would GLADLY pay to end this nonsense).
I have multiple ADRs for my Sept. trip and I have absolutely no intent of cancelling or skipping any of them. They are not for the same restaurants and they are for different times, but several days I have an early lunch and a late lunch and one night I have an early dinner and a late dinner. At least 3 CMs at the dining line have told me they will absolutely not be cancelling my ADRs.
It is ridiculous, IMO, to get all upset about what other people do on vacation. Everyone has the same chance to book whatever they want at 180 days out. If they don't then that's really not anyone's fault but their own for not planning ahead.
Sorry, but on my vacation, I don't honestly care about what other people are doing. I only care about my group's enjoyment and that is my focus and I'm going to book meals in a way that works for us. I guess that makes me a horrible person in the eyes of some but I really do not care.
You know, I really think WDW should go back to allowing walk ups when the ADRs are not there on time like they used to do. This would alleviate most of the problem.
You have an ADR. You show up at your time. If you show up 20 minutes late, an a walk up showed up at your time, you just might have to wait...