I did have a - luckily - cheap bass stolen once. I was pretty sure who did it, but didn`t want to throw any accusations, so I went to their next gig. With a claw hammer. Probably lucky for all of us that said bass was nowhere to be seen.
But, lesson learned, don`t leave your gear to your band-mates to bring to gigs/take back for you. The singer of the band had brought all the gear in the van, and then said he would load up/take it back. He just thought I`d taken it back with me.