The real proplem with these groups is if tshtf they could turn into a well armed band of looters that feel they have the moral high ground to take what they want.
Oh ya now when things are ok they like to give platitudes on how they will be there to rebuild and help. I truly believe they will get to the point that taking what they want will be for "the common good" so that they can help more people.
That is the vibe I got from the Florida and Indiana groups. Not so much from the Arizona guys. But I could see them coming in and 'collecting' weapons and ammo for militia purposes, and dictating that if you want to keep your gat you have to join them. Something like King George's press gangs.