Sure, and while, TECHNICALLY, a 4e fighter can just walk into the town square and invoke 'Come and Get It' on randos have any of us ever seen this actually done in play? I call this sort of objection to such mechanics a spherical cow. OTOH if people are complaining that some archer minions OVER THERE would have to be mighty stupid to suddenly rush into melee with Fighty McFightface, and it seems like magic is the 'only answer', I think there's still a fair grey area here. Maybe one of those guys knows Fighty from way back, maybe he's just a fool who thinks he's a bigger man than he really is, etc. And on the third hand, Fighty is already supernaturally capable in combat, so why not assume his Martial Power Aura can't simply compel opponents to 'Come and Get It'? I just don't see how that's a problem, except as others have stated that it treads on some specifically D&D genre trope about fighters.