> a) unreliable People distributing unmentionable content or using services for otherwise nefarious purposes are used to dealing with intermittent issues like

> a) unreliable People distributing unmentionable content or using services for otherwise nefarious purposes are used to dealing with intermittent issues like that. It'll get rid of some but not all of them. > b) applying client side encryption a la https://privatebin.info https://privatebin.info > c) expire & purge the (encrypted) content quickly If your site turns out to be being used by a group that is raided, this will not stop your services being confiscated and very thoroughly investigated. You might be legally in the clear, but it may cost you time and hassle (and potentially money if you need to take on the services of a lawyer to help prove you did not intentionally aid/abet). Also an end-to-end encrypted solution like that might be rather attractive to users both illegal and otherwise, so be ready for a huge bandwidth bill if/when a sizable group latches onto it!