In my class (Industrial mechanics and welding) we have some idiots, and some people that just piss me off because they have no respect for anything. Most of the time the Aluminum Tig is contaminated, i've seen people try to weld steel with the aluminum tig, the other day one kid tried to drill a hole through a piece of 3/4 aluminum with a center drill... All this makes me look like a pro machinist tho haha, so its all good, my teacher was impressed that i knew how to chuck something into the lathe haha.
Then we have the idiots who break stuff and have no respect for the tools, recently a couple kids cut up the sifter we use for the bead blaster, so they could use it as a screen in their bowls... people steeling brass fittings to make bowls. One kid (same one who cut the screens), i recently saw welding on a decent (prolly $20) piece of square stock...just because he could.