Good to see a new thread, things were getting a litle cumbersome.
It boils down to, a right is also a responsibility. However, how to tell a person is responsible?
Now the question seems to be, why do I not automatically approve of people I don't know carrying around me? The other thread put the emphasis on a home situation, but it applies everywhere really.
Normally, I don't have a problem with it, indeed I even teach CHL classes here in Texas. For free.
In a nutshell, I have a problem with idiots. You cannot easliy identify them before something nasty occurs.
There are some situations where it is possible to limit idiot behaviour.
My home. (No carry until I get to know you) Work, (No guns without proir approval and inspection, no ammo in class) At the range. (No firing other than on the firing line, No handling of weapons when the range is cold, no one allowed without a range safety briefing.)
There are rules about firearms in all these places. None of these rules are onerous, none infringe on a basic right. These rules are not guarantee against idiot behaviour, but they help.
As an example, I point to the thread about the gun show shooting. Idiot at large without a doubt, two people wounded.
Basic safety rules violated, by someone you have just met. transfer this situation into any location you wish. Wouldn't you want to limit the posisibility?
Apparently according to the thread this particular gun show bans the carry of loaded weapons. Does anyone here wish to make the argument that a gun show is infringing on your gun rights?