LOL! Constitutional talk. What?
In one more time before this gets locked!
At least with my local Best Buy stores, there are no signs saying you can't carry a gun, or a knife, or wear your shirt collar up with your hair in a fo-hawk.
I regularly EDC my G26 and a blade at any place where it is not restricted, which has included a Best Buy or two.
And like I said before, you shouldn't support Best Buy because you are getting taken and your privacy can be violated. This whole firewall debacle is the least of what you should be worried about...