I've done some pretty stupid shit in my life, especially when drunk. Never in a million years, even when drunk, would i think "hey ill just shove this fucking wheelchair right down the stairs"
Some people (and im not singling out pfa) debate the whole "but there was nobody in the chair!" argument - which is a pretty fucking stupid argument anyway imo. However, I haven't heard anyone anywhere bring up the simple fact that a large metal object with some weight is being launched down a long stairs with a blind corner. Had a person, especially a small one, come around that corner, it could have caused some injury.