There are many things that are not allowed in all shows, concerts, and sporting events... and everyone is searched before entry. I have never tried to bring a gun in when I went to see the Eagles, Rush, Journey, The Jersey Boys, Tom Petty (RIP), or even Disneyland, so I don't know if there is any way possible to get a gun through. I seriously doubt it.
.
So wait, that search wouldn't be an infraction on your hallowed 2nd amendment? Even going further and denying entry when in possession of a weapon isn't an infraction? Clearly I am drawing arbitrary lines now but atleast know you do the same...
.
And YES! Every time a "good guy with a gun" stops the bad guy, it outweighs any time that it didn't happen. I strongly wish that everyone would stop complaining about guns long enough for everyone to vote on repealing the 2nd Amendment. Please! Someone introduce the repeal so it can get soundly defeated by the people... maybe then we can stop the insane arguing about guns.
.
And any time neither "good guy" or "bad guy" was present all together? Wouldn't that even be that much better?
And for the umptienth time, nearly everyone discussing this want an ADJUSTMENT to the reach of the 2nd amendment, heck it doesn't even have to be changed in the amendment itself. Just a clarification on what is and isn't allowed, a clearer and (for some) saner amount of gun ownership is all that is sought. Heck find me 1 post where I advocated for complete gun proliferation, let alone me stating the US should do this (I specifically start with the notion that a "gun-free" US is a myth, nor that I would even consider it possible).
A brilliant and simple notion many construct fir this is coupled with your even sacredest 1st amendment, for instance you aren't allowed to yell "fire" in a theatre. The notion carries with it the understanding that certain limits are already present on the 2nd amendment, or are you gonna tell me you folks hoard tanks and other military equipment the US army has?