Oldschool___gg is a ban evader

http://www.sythe.org/members/413864-oldschool___gg.html
Banned-
http://www.sythe.org/members/394964-fifaking786.html

Fifaking banned Oldschool registered a while after but not that incredible of a time period.

IP shared as seen here-
http://prntscr.com/5r1ty6

Both users sell FUT Coins as seen here-
Oldschool-
http://www.sythe.org/playstation/1748079-selling-fifa-coins-cheap.html
http://www.sythe.org/playstation/1746195-selling-15m-fut-14-ps3-ps4-coins.html
http://prntscr.com/5r1ugw

One could refer to this as coincidental however i've found something that almost confirms they're the same person.
http://www.sythe.org/playstation/1748079-selling-fifa-coins-cheap.html
As you can see he has his skype posted as
live:hassy___786
http://prntscr.com/5r1uoq

With 786 being the end of his skype, and just happening to be the end of the name of the banned profile, it is obviously him.

 

Hammered.