Apparently bumblebee snails are carnivorous and will go for other snails (found out after I bought two). Having said that I must have the laziest pair in the world - if they even move I mark it on the calendar...
I'm only FOWLR at the moment (will change when the bigger tank/better light/better skimmer come on line) so haven't had any real problems with the turbos. They do charge around the tank rather so I can see the potential for destruction though. Seriously, one minute you can't find one, the next there's one slap bang in the middle of the front glass - kinda freaks me out
I have a couple of small blue legged hermits too, which haven't been a problem, and are great entertainment - they're crazy and always up to
something. I made sure they had plenty of spare shells so they can move house whenever they want. From what I hear, I get the impression that it's when they get hungry or can't find the right shell they start to cause problems..