The comments about the mall and 'gun free' areas etc got me thinking, that and it's quiet at work today so I'm reading the boards

I'm a gun owner so this isn't anti-gun. I like to shoot, and have a pretty decent arsenal at home. I'm just curious if the folks believing that they should be able to conceal and carry, believe there are any places that should be gun free?
I'm married to an ER nurse. They see all kinds of crazies. Should they be allowed to carry? I work with 'troubled teens" in a shelter. Lots of them have had gun offenses. Should I be able to carry a gun? I'd be lying if I said there haven't been a few I'd like to take out back, but I've never considered that carrying a gun would be reasonable.
How about a church? I always thought it strange when they had to put up their signs outside saying guns were not permitted in them. Do you believe they should be?
I guess I'm trying to figure out where the line is, or if some folks believe there is no line and they should be able to carry a gun anywhere?
I've only ever been in one situation where someone had a gun and he never pointed it at me, but he was trying to use it to intimidate me and made sure I saw it. If I'd had a gun, it's the last thing I'd have used as I believe it would have escalated the situation. I talked my way out if it. My knees shook afterwards, but I just can't see carrying a gun. It feels way to wild west to me.