I too have seen some Un - Respectful players on tournament games before too. If I was TD I would have DQ'ed him for it as well. If you want to beat on you own games feel free. But don't beat on others games who are providing them for your tournament play.
We hosted a release party here once and almost had to kick a guy out. I spoke to the TD and told him, it his call. But if he does it again I will have to make the call for him. TD spoke with the player, who got real pissed at me about it, but stopped beating on the games.
Death Saves, Extreme Tilts, Forcefully Hitting or kicking the machines should not be allowed.