GRINDR, BLENDR. The Danger of ‘Hook-Up’ Programs. I’m an optimist, a Cup Half-Full person. These apps may be the hippest in social networking, but let’s not pretend — BLENDR & GRINDER is truly a Cuisinart of butt Call. And, under-aged children are utilizing it. By Lisa Barr You can find, however, a few things I...