Martian Ambassador Bolkar
I always play out this scenario in my head every time I use a restroom at a convention or show: the complete annihilation of our species because a few of us can't grasp the concepts of "the waste goes in the bowl, not on the seat", "Flush when you're done", and "for the love of god, if you leave a mess, CLEAN IT UP!".
Good thing he didn't see the ladies' room. The Martians probably would have obliterated Venus, Mercury, and the Moon just to be sure.
Say, this is the 99th b&w Mascot strip. Perhaps I should do something to commemorate strip 100. Hmm...