True, I suppose. It depends on his/her level of "toxinebreicity," though.
I've had people hold drinks (swaying back and forth while trying to stand up straight, with liquid pouring over the sides of the glass) over my Juno G keyboard, over my DJ set-up, and once, a drunk college girl even poured a beer over one of my cymbals when I was playing drums. And everybody just loves to use our speakers as their own personal "drink stand," don't they? I try to intercept, and keep _anyone_ with any "liquid refreshment" at least arms-length at this point, whether they are the host, or think it's rude, or not. I don't care, they don't buy my equipment (not directly, anyway!)...