To be fair, I've been "using pragerU in the classroom for years" ... for STEM even.

I have a folder of "Terrible graphs" that I use for discussions for stats students, they make so many horrible graphs I had to only pick the most interesting examples so that there is more variety. 

(And I've been using them less since the students say it's too easy to spot that flaws. It's more fun to dissect a bad graph that made it into a major newspaper.)