Thank you for the help John
. Actually I turned on the validation of new uploads, it has to be tested. I should receive an email when an user uploads somthing. It will make things a little slower but it's necessary to stop this behaviours at birth. That guy used an hotmail account, so I wrote to the abuse there and asked to take action because I don't want to ban new registrations with hotmail. he used an IP from egypt so I banned it too, but however, becasue the site is "secured" (no new users can post anything visible before the approval and they can't upload without approval) the last thing that remain unsecured is the upload of pictures. since nothing will happen there I will keep approval disabled there, but it can happen that sooner or later I'll have to turn it on. meanwhile I'll search for the software we use for the free stuff page in oredr to look if there is any upgrade qith new features to have controls of these episodes.
I've also put gray's robot directly on posetteforever