I don't know if snails actually drown in beer. It's supposed to work for slugs, but-- and this is a true story-- I used the bottom of a soda bottle set into the ground a bit, containing a good slug (haha) of beer. The next day it was full, and I mean FULL of slugs. I threw them on the compost heap. A short time after, I returned to see the last of them staggering off. My theory is they got really drunk and just passed out. If I'd put more beer in or thrown them into something they couldn't escape from, I would have been OK.

Hedgehogs eat snails. Plus, they're cute and fluffy... well, not so much 'fluffy'. They're cute.