You betcha!
This thread dovetails with another current one about what constitutes paranoia. I think one man's paranoia is just another man's being cautious, aware and prepared.
I spend a good bit of time in my yard, working with my dog, occasionally doing minor yardwork, or just sitting in a lawnchair enjoying a cigar, sometimes using my laptop.
As hot as it is right now, I'm often out there in nothing more than a T-shirt and shorts, but I have a waistpack that rides in front, covered by the T-shirt, and my trusty Colt Mustang is inside (in Condition 2). I can have it in my hand and just look like I'm scratching myself under my shirt!
I have a 4-ft. cyclone fence around my yard, and my dog is very alert, but my street is a minor thoroughfare through the neighborhood, and there's still a good bit of pedestrian as well as vehicular traffic going by, and some of them, frankly, are rather anti-social-looking people.
I wave and smile at everybody, even the ones who may look questionable (or maybe especially at the ones who look questionable!), but the bottom line is that I feel I have the upper hand (and the element of surprise) no matter what.
The downside is that, in most scenarios, my across-the-street neighbors' homes would be downrange.
P.S. [OT] A friend asked my how long it took me to mow my lawn; I told him it took about 25 minutes. He told me it takes him over 2 hours. I said, "Yeah, I used to have a mower like that!"