[diggan]

USB sticks attached to keychains are already widespread in some communities (DJs for example), I'm sure us software people could do it too if we wanted to :)

[zamalek]

I leave my keychain at the door when I get home. This is probably a common practice.

[felixg3]

That makes sense. I once got falsely identified as a DJ, but it was just a YubiKey.

[Perz1val]

Also attach an USB killer for extra thrill