Wow... even my 3 year old knows pretty well "If it's not yours, don't touch!"
Certainly more restraint than I would have shown, but I've had 2 rounds put within 18 inches of my gut by friendly idiots already.
My range is private, keycard access, so I'm not TOO worried about random people, but I'm there absolutely alone often.
I'm uncomfortable enough with people at the range I habitually keep one sidearm loaded on my hip while shooting/handling the others. Right now the BUG is the .45 Schofield with Winchester 225 silvertips.
It's not paranoia, it's just unfortunate history and a lack of exposure to more shooters in person.
If a complete stranger, without a word, walked to my range bag, picked up a weapon while I was cranking the target back...they'd have about 5 seconds to put it back, and leave the premises before the police were summoned.
Being big has some advantages, fewer people screw with you at random, but you get the more "committed" ones instead. Being disabled means "self defense" is a heck of a lot easier for a judge to understand.
Note the Sig. Machiavelli had it right.