I agree w everyone, at low limits, especially against unknowns, you simply can't fold KK pf. So many players at that level will get felted with QQ, AK, AQ, and even smaller pocket pairs that you simply have to call. I believe that someone is dealt aces 1 in 27 times that someone has kings (correct me if I am wrong). With that math, and considering the WIDE range of hands some of these low limit beginners will push with, I'm insta-calling.