I guess I lucked out, I had one little tiny snail that was in one of my vivs that came from the moss. I just left it alone. It got bigger and occassionally I saw it. Now I don't see it any more. Must have died. Now I can't say as though I'm sorry seeing what damage they cause.
My mother has snails out the wazoo in her garden. My 8 yr old daughter and I are always picking around finding the shells and pulling out the snails and/or washing them up. I use them as decorations in my terrariums. Just the shells, no live ones go into the terrariums anymore. Now I always get asked.....IS THAT REAL?
I have a bunch of empty ones left if anyone wants them, they are kinda neat to mount air plants on, just silicone them with the opening out and tuck the base of the plant in the opening with some moss to hold it in place.

I'll find a use for anything..