Yes. At any gathering of a certain type that’s large enough, like a music festival, you run the risk of eating or drinking something that’s been spiked with something. Most people who do so try to be up front about the “bonus content,” but because of legality they will often couch it in lingo like “space brownies” and the like. If you don’t know what that means, you could be in for a wild ride without anyone having ill intentions.