At my old local someone waxed the shit out of the ground right at the step off/turn around part of the run up to the flat bar. That was fucked up. As for stairs, some are just asking for it.
Recently at mine, some local kid straight up went and waxed the fucking pyramid I shit you not. Did that for an Instagram clip of a powerslide across which you don't even need wax for, some other locals do it all the time without. Specifically did that on a day where none of the older 'regulators' were around and singlehandedly ruined the pyramid for the next two weeks.
Not as bad as that other kid who a different time bent not just one, but two of the identically built flatbars on the same day by what I later learned was jumping onto them on some electric scooter thing (but he normally skates). What particularly eludes me there is I'm sure he probably realized what he did to the first flatbar, but still consciously went to the second one and then did it again.