At low limits, you can bank on anyone playing Ax all the way to the river. ESPECIALLY if they hit their Ace. Whats worse is big hands like AK lose quite often at low limits to Ax because Ax pairs the kicker more often than you'd like it to... Of course, they have the same odds
to pair their 4 as you have to pair your K, but unfortunately, they play the Ax, and their kickers are going to be random, while a strong players kicker will almost always be J,Q, or K, which gives them a little more chance to be lucky - as you never will know which one they play. On the bright side, when they DON'T hit their kicker, they pay you off nicely.