Just a heads up.
Running a family friendly site, I have very strict blocks set up. I block all the Sensitive Categories and many of the General Categories too.
Yesterday I had a complaint that I was showing inappropriate ads. After spending a fruitless hour searching through the Allow and Block Ads dashboard I decided to check my blocks and found that they had all disappeared. Everything - Black Magic, Sex, Gambling, Alcohol, the lot - were "green" and good to go.
Horrifying.