Agd_Scorp is a known Turkish defacer who has defaced many high prolific websites. He has been linked to underground hacking groups like Pakbugs (even though he is not from Pakistan), TurkGuvenligi(he already left this group), and TurkishAjan.
His dox can be found here: http://www.madleets.com/Thread-PAKbugs-Exposed-D?pid=7278#pid7278
A lot of underground people respects him a lot.
There are some lamers who uses his handle.
He now goes by the handle 'Maxney' after he left TurkGuvenligi group.
http://packetstormsecurity.com/files/author/10199/
http://www.madleets.com/Thread-Agd-Scorp-is-Back-With-Proof
http://www.madleets.com/Thread-PAKbugs-Exposed-D?pid=7278#pid7278
http://www.zone-h.org/archive/notifier=agd_scorp