Well, that's interesting that you guys haven't seen it, because I see it all the time as well, and I have a big problem with it. Because of that, I am considering dumping Android and moving to iphone when my contract is up. I'm sick of it, and kids-and adults-don't need the temptation.
There is a body of research indicating that material of that nature is addictive and seriously affects the development of neural connections, and as such, that garbage has no business being on a public site. If they want to add a specific section, similar to the 'games' section, with a disclaimer and ability for a parent to lock it out, fine, but it's absurd to have it on your phone.