music festivals & drugs

i just went to gathering of the vibes (a three day music festival) and there were tons of people selling drugs. The people who go to these festivals are a pretty chill croud so i figured there wouldn't be too much ripping people off. But i bought what i thought was a gram of hash and i weighed it back home and it was only .5 grams. (i'd never seen hash so didn't know what it should look like).
anyone else have experience going to things like these; i was wondering how often bad drugs or rip offs are sold???
thanks

I know whta you mean, i once went to this music festival ON SHROOMS. i was watching the guy on stage play a guitar, and the outline of the guitar just came out and faded over my eyes.

from my experience music festivals are probably the best places to get drugs. the dealers ive run into at festivals are very friendly and have fair prices. ive never been ripped off at one before.