Users should not be required to make sure there's no objectionable content in someones posting history before they hit follow.

No, I honestly think that users should be vigilant to know who they are following or at least if they know they are following someone shady, then they should do something about it.

there was one exception which was one of a topless girl which cannot be argued reasonably looks over 18. The ages of the others ranged from uncertain to really pushing credulity. Mixed with that are a number of posts of young legal professional photos.

Being uncertain about the criteria of those girls used in these pictures is not a valid reason to defend the contents. It is actually more of a reason to be vigilant and block such contents to prevent further distribution and further encouragement. If today they are posting pictures of girls that are in the limit of being teenage or legal age for porn, next they will push the limits further and further. Makeup tend to make kids look older than they are. And anyway, I sure hope he will not start posting porn pictures of 10 years old or younger just to convince you that they are posting pedophile porn.

I think that instead of attacking @titusfrost the person who is trying to make us aware of this situation, we should support each other against such posts and warn those in the follower list, in case they don't know about the contents.

Pedophilia should never be taken lightly.