In the first demo it looks like he's trying to bait a possible hacker, can't really call it friendlying as he was attacking periodically. In the second demo he's using the rocket jumper to quickly jump behind enemy lines without taking damage; a valid tactic. He then proceeds to attack the sentry and teleporter with the shotgun. As far as him calling "Thanks" while getting shot, yes he should have been attacking but that's one small example, we'd need a longer demo of him repeatedly going back behind enemy lines and not attacking.

Thank you for the report though, we always appreciate vigilant players in our community who try to keep everyone honest. Keep up the good work!