Lizard said:(Consider, for instance, that Wally the Warlord is dominated by a mind flayer. Fred the fighter wants to make sure Wally doesn't go postal on Willy the Wizard, so Fred marks Wally to try to force him to attack someone who can take a swing or two. Saying "You can't do that!" deprives characters of an important option. Not to mention that roleplaying wise, PCs can and do come to blows. It would be a very odd thing to say a power can affect a PC when there's a debate over the ethics of orc torture which led to interparty violence, but not under other circumstances.)
In all of these situations the person with the green circle around their feet now has a red circle, and so your examples are moot.