You'd think getting chopped into a million pieces and cast into the darkest part of the Underworld would give him a subtle clue that nobody wanted him around.
Rick RiordanPercy: I’ll walk down to the cabins and Connor and Travis are stealing stuff from the camp store, and Silena is arguing with Annabeth trying to give her a new makeover, and Clarisse is still sticking the new kids’ head into the toilets. It’s nice that some things never change.
Rick RiordanNow, come over here so I can pat you down." "But you don't have-" Percy stopped. "Uh, sure." He stood next to the armless statue. Terminus conducted a rigorous mental pat down. "You seem to be clean," Terminus decided. "Do you have anything to declare?" "Yes," Percy said. "I declare that this is stupid.
Rick Riordan