Look, ask yourself if you would ever do in a non-team game the unusual move you"re considering doing in the team game, and if you can say yes, go ahead and do it. Then if you get quizzed on it, you"ll be able to state your defence. If you can"t say yes, it"s wrong. Don"t do it.
There"s a LOT of situations you"ll be able to say yes in, too. Hands like A/K do get folded in NON-team games, as do massive pairs against multiple people. Folding to an all-in with those for only a portion of your stack, that doesn"t happen, unless you really need those chips in a close-to-the-money scenario. Anyway, big hands DO get folded. Well, that"s mostly folding stuff, but there are other things too. What if someone"s all-in (your teamie) and eligible for a side pot, and you raise with nothing, getting rid of your enemy and handing the pot to your teamie? Well, that does happen in normal tournaments, too. They get ripped apart for it, but it does happen, and those people never had agendas. They genuinely thought it was a good move, I guess. A lot of weird stuff happens, even multi-tablers accidentally on purpose mis-clicking fold for 30 chips more.