I wrote about this recently, and then a client (not mine) from Twitter contacted me to explain his weird experience with P411 approval (scroll down, it's toward the bottom).
For what it's worth, I didn't have to show ID to join P411. I only needed to prove I was legit via website, ads, board profiles, and reviews.
P411 isn't perfect, but even with its faults, it beats Date-Check any day, lol.