I recently had it out with Pandora over ads. I know that ads are how they make their money, I get it. However you get to choose the type of music, but you are still getting the type of ads you don't want shoved down your throat. This had to do with explicit material in ads, as I used to listen with my kids present. When I first complained, they gave me instructions how to ban explicit content from my account. It worked fine with the song selection, but explicit ads were still coming through, so I told them to shut down my account. At least on a medium like facebook, you can vote down offensive or annoying ads and not have to see them again.
Same thing with TV, once we had kids in the house, we cut the cable because regardless of the shows you let your kids watch, you never know when some offensive advertisement is going to pop up. I am sure my kids will some day learn all kinds of explicit language and see nudity and killing, but it won't be under my roof.