I have a cush job, a nice home and live in a nice area. Doesn't mean I shouldn't be prepared to defend myself and my loved ones should the need arise.
You live in America, you cannot be arrested for legally carrying (note, I said legally). The most that could be done (in the letter of the law) is for you to be asked to leave the premises.
As also mentioned here, all the martial arts training in the world doesn't mean s***, depending on the circumstances. A weapon (gun, stick, knife, whatever) doesn't mean s*** depending on the circumstances either. A normal human cannot draw a pistol and put hits on center mass against an attacker closing from 10-12'. You need to have a complete arsenal of self-defense methods, and a gun is just a tool to add to that arsenal.
Also, to address the "only in America" arguement, give me a break. Show me one place where "gun control" works (with factual data, not heresay). Gun control is not needed, the laws that are in place need to be enforced. Someone commits a crime with a gun? Lock them up. Someone unlawfully sells/buys a weapon? Lock them up. Simple as that. I don't understand how taking away a law-biding citizen's (the only ones that actually pay attention to the rules) weapon helps anything.
