You won't get to TP Guy's house! You can TP his park bench, because that's where he was going to sleep that night in the flashback!
On a side note, I want to say that nobody should address what Guy said to Monsoon about not killing Arceus. He was out of ear shot, and plans to go along with everybody for at least a little while more. So, as far as everyone else is concerned, Guy is still has their backs.
Oh, and, Happy Birthday to Psychic!