In a roundabout way, that's not entirely bad news since Politifact and Snopes are usually biased too.  Don't really want them being too influential either.  

The worst bias is often the subtle type, where people let their guard down and just accept how a "trusted" source spins things.  It's like the frog slowly being boiled in the pot, oblivious to what's happening to him.

At least blatant bias is easier to recognize, and therefore guard against.