I thought of another thing, along the lines of boundaries- Kissing strangers. My friends and I tend to get very affectionate while rolling, which is fine, but we're not really ones for making out with random people either. Still, after getting a good light show from someone and them asking for a kiss in return, that's no problem. A peck is fine. But my friend was approached by some guy one night that explained that this was his friend's first rave and he'd like a "rave kiss" from her. She thought this just meant a peck, w/e, so she said yes. He proceeded to pretty much rape her mouth with his face until she pushed him away. Not cool.