I disagree. People come into close contact all the time. I've lost track of the times people have ran into me or bumped into me carelessly. Mostly in stores or malls because they don't watch out.
I wouldn't freak out anytime someone came near me. I would be aware of my surroundings & made sure my firearm/gear were concealed.
I've seen many "professionals"(plainclothes cops & security) carry pistols that printed.