There are usually a few accidents and mishaps at most parties, if you are careful, know one will actually know you were the cause. Loud music, usually means drunks and druggies, so if you don't partake, you have a huge advantage. If you set a drink or plate on the floor, in a high traffic area, somebody else is going to actually do the spilling. There are plenty of things that you can do discretely, that would go unnoticed until you are well out of way of suspicion. You don't really want any one person to be blamed, but the entire party experience. Maybe I just have a more devious mind, and a little more subtle in my ways. You just have to keep an open mind, a seize the opportunities that pop up. Just thought up another angle, find or make some 'fake' hidden cameras, and poorly conceal them in 'privacy' type areas, like the bathroom. The guests will suspect the hosts are perverts, or somebody from the party...