I find it comical. I'll get people that are like "I've been watching you drive all over the city and in a bunch of circles all day". Usually the days that I'm all over the place getting irregs off, finish up business, start house calls and then have to dip back into businesses for pickups.
Hell, I just tell the stalker “ Sorry, the package must’ve been loaded on the wrong truck, I don’t have it.” Then when I finally get to their address, I tell them I had to go track the other truck down.