When I carry the ole Glock 17, I make sure the trigger is in the "pulled" position and that there's no round chambered. This requires me to manually rack the slide to chamber the round. Much more of a "safety" that a little lever or button. Of course, other handguns can do this as well, and in addition the traditional lever / button safety. Anyway, just my 2 cents...
you'll catch a bunch of flack over it, but you're not the only one.