tumblr has had a limited issue with child porn being uploaded. this is nothing new. Facebook, Twitter etc all get it as well.

but rather than deal with it, which will cost a lot of money, they have elected to take the cheaper route of banning all adult material, penalizing legitimate users and effectively killing their site.

and it won't make any difference. the scum posting this material are breaking the law anyway, will saying "don't post it here" stop them?

Airport security is a burden we must all shoulder. Do your part, and please grope yourself in advance.