Recently did a gig where the opening band asked about using my kit.... we had set up early and did sound check, they showed up a couple hours later. Other band was playing 30 minutes, so of course I'm gonna do it, it'd be easier for everyone (both bands, other drummer, sound guy). I've done this plenty of times with mixed results, normally guys leave everything as is and they do fine. This guy completely changed the setup, tuned every drum insanely high pitch, overtightened wing nuts, and pretty much beat the living crap outta the kit, then high fives the other guys in the band as he leaps from the stage, without even attempting to return any of it to its original position. He did manage to come back up and ask for the shot of Fireball he'd left sitting on the monitor. Then, I've got a 3 hour gig on drums that sound like timbales unless I sit there and retune everything. No good deed, right?