On a more serious note: it is theoretically possible to "carry a cop". You can do it through technology, with lots of surveilance and so forth.
It's called a "police state" and it's very popular among gun-banners and nanny-staters. Great Britain is doing their level best to make it work right now. Thye may eventaully succeed, and become like Japan, where weapons are banned and there is no street crime, enforced by yakuza thugs, or more likely, by intense fear of a state apparatus which respects no rights and presumes no innocence.
That's what it would really mean to "carry a cop", and I don't want any part of it. No Patriot Act, no wiretaps, no Homeland Security, no gun bans, no surveilance, and no disabling of rights, none of it. I'll take liberty and along with my friends and family we'll take care of our own personal protection, thank you very much.