You should really read up a bit. I made black berry wine one year, turned out awesome. The next year I did the same, and wound up with 'MonteZuma's Revenge' without going near Mexico. Worst case would be if you fermented methanol instead of ethanol; you could end up blinded or dead.
When it works out though, it is fun. I'm thinking of buying myself a Beer Kit for Xmas this year.
good luck