Being 6'2" tall and 245 pounds, I never worry about shit like that.
tavener
What do you do if you enter a room, and thought there isn't ANYONE in that room you could "take"?
I bet that happens a lot to you, oh Tavener of the small penis. 
Alas, 6'3" but only circa 175 here.
And ooops, you reminded me of something.
I mentioned that I always eye a stranger trying to decipher if I can handle him if there's trouble.
It just makes sense, when one doesn't know what the other guy's up to.
Three years ago, about 1:30 in the morning, when I was sleeping, someone turned on the light in the kitchen, waking me up.
I got up to see what was going on.
It was a guy in his late 20s, who apparently was hollering (but I didn't hear it) asking if someone was home.
He was drunk, so yeah, I could handle him.
Actually, he was harmless; his car had broken down, and he needed to borrow a couple of tools to set it right again. The neighbor and the property caretaker keep their tools in locked chests in the garage; I gave him the keys to one of them which I knew had what he needed, and reminded him to return them when he was done (of course I collected his name, address, and telephone number).
In the morning, the tools were on the dining room table, with the key.
Some months later, this same guy, who works for a steel company in the big city and makes tons of money, came to me to have his income taxes done (and has come here since)--I'd been recommended by one of his co-workers.
Oddly, he doesn't seem to recall our first encounter, which surely should have made
some sort of impression, even though he was drunk, given that I was in the altogether at the time.