I've had a drummer that "forgot" his cymbals, another that forgot his snare. A few with no Sticks. Bass player that forgot his bass, several guitarists forgetting patch cables, and more than a few active guitars with dead 9V.
I'd charge them 5 bucks for a recently swapped out used wireless battery... More than enough juice for a couple of nights in a guitar.
If you do this long enough, you see just about everything.
Chris.
In my experience, singer / songwriter types are the worst offenders. I frequently have artists ask me for all types of things that they should be carrying with them. Fortunately, I've got a box of capos, guitar straps, guitar stands, picks, cables, etc, that the artists who actually remembered to bring them to the gig, left them at the gig.
With regards to creeping kick drums, here's what I do on my personal kit. Granted, it won't work with every kit due the differing distances of the kick drum spurs, but it works perfectly. Been doing this since the early 90's and I've never had one tear out of the rug.
