Not sure you actually read the posts here.
In the multiple threads on the topic the posters here have been overwhelmingly with the students. Posters are against any sort of boycott, but nearly all would like the student tailgating lot thing to work out. Most posts have been about details of how that could be done.
Also I don't think you could correlate the talk about luxury cars and wealth with the same specific posters who are complaining about high water prices. There are many people of varying incomes, backgrounds, etc. on these boards. All opinions expressed are not the same person's.
I did indeed read the posts. There are many calling students out for being entitled. I can quote them if you like?
I could 100 percent identify several specific posters in this thread who have done some wealth flaunting in the past, but they know who they are. Suffice it to say, as someone else did, if you can afford game tickets/parking pass/fuel to the stadium/a tailgate spread/pre/post-game beers at an overpriced bar, then you can afford an expectedly marked-up bottle of water. Or you can plan ahead and drink lots of water before you go into the stadium. Or you can grab water at a fountain or sink. This really isn't a big deal.
It might be different if RU was breaking new ground with this rule, but it's basically aligning itself with every other venue and event out there, so ... this is the epitome of adults carrying on like spoiled tweens.