RoryZ - TrolL
T - RoryZ Rhymes with Tee
R- First letter of Username
O – If you flipped the second R with the O it fits into place
L – there are 12 letters between ‘L’ and ‘Y’ in the alphabet therefore if you flip 12 it becomes 21 or 21st which is the date he joined the site.
L - The letter before ‘Z’ in the alphabet. He used Z for a final attempt to throw you off the trail.
All of the clues were there lads. Be careful of future trolls!