This may fall into the category of thing that should piss you off but I don't care. I'm pissed off when I go to the gym and cretins don't take the time to put weights away or they put the weights away incorrectly. There is a proper place for each plate to go. This is an example of how NOT to do it:
Notice the branch on the lower left. There is what looks like 2 5# plates on top of 2 25# plates on top of a 35# plate. If you want the 35# plate you need to take off all the other plates. Each weight denomination should be on its own branch. This isn't rocket science but I see it all the time.
I'm going to bring my phone to the gym Friday (another thing I hate: people on their phones at the gym) to take pictures of the more egregious examples and I will report back.