As internet folk, we probably all have at least one friend who’s incurably addicted to Foursquare. I definitely do. Steve, this one’s for you. Y’know those people in your social networks, who you’re only kind of friends with, and you wouldn’t really hang out with those people, but it would be awkward to delete them, so you keep them around hoping they’ll go away, but they just so happen to be the ones who stalk you and comment on everything you say and do online? Y’know, those people? Don’t lie, you’ve got some of those people. Enter Avoidr. Assuming you use Foursquare (and are friends with those people…