In all the times I've shared my snakes, I've never had that happen. Not even when they haven't done a 'meet & greet' in a while...somehow they seem to know they're safe? I agree it would be awful though, & I've heard of that happening (very rarely) but I just don't personally worry about mine. I think the worst one I've heard of was a large python being held for photos that suddenly bit someone...really makes bad publicity for all of us, & as well as our snakes. We really need to make sure we really "know" any snakes we decide to "share", but I wouldn't worry about Dave's either.