Not really.
All he has to say is "I WANT!!! MY SON!!!! BACK!!!!" and then calmly explain that because it's HIS SON who was kidnapped he gets to make decisions for all the rest of the survivors, which includes how all the guns are to be used and who gets to use them and when. I seriously would not have been surprised last night if Michael had said the only way to get HIS SON back was for him, Hurley, Claire and the baby to head off on their own with all the guns but no ammo and Jack had said "Okay, Michael, we'll do it your way."
Perhaps at some point - I'm thinking around day 50 of this - everyone just threw their hands up in the air and decided to stop even trying to make decisions to survive. The island is magic, the "Others" kidnap people, food is falling from the sky, there's still a monster, and people are dying left and right - so you know what? To hell with common sense. If Michael is acting crazy, let's all follow him into the jungle. Oh well....