Then how does that deny Locke the right to talk to Henry? She flatly told him "I dont think thats on the program", plus Henry is tied up and cant even move let alone attack anyone.
Sayid is not obsessed with guns, hes obsessed with revenge. He only had the gun because Charlie gave it to him, he never asked for it and he certainly wasnt staring at it longingly while it resided in Charlie's pants. Ana constantly brings up guns ("We should go check it out with guns", "Maybe you should give me the gun", "Did you get the guns?" "What the combination lock for the guns?"
and since she took this one from Sayid she hasnt put it down, its like its welded into her hand.
Also Jack isnt obsessed with guns, he is obsessed with being in control and solving problems. The guns are just one of the ways he tried to do this, he clearly isnt that obsessed with them since he prioritized the medicine over them.
Nearly every time we see Ana with a gun she's either threatening someone (Libby, Bernard, Sawyer, Jin, Michael, Eko), firing it at someone for no justifiable reason (Michael) or killing someone (Shannon, Jason). Thats not a very good solution IMO.