You could always anchor it to the stand with industrial strength Velcro. That alone would be sufficient to deter theft. Of course, the other option is to play in places where they don't steal anything that isn't nailed down.
Gary
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)