Using trainers since 2012 and didnt got any notification or warning since then. Why i use it? - I dunno, maybe its cause of the ez and comfortable way and the conclussion that EA wont fight it in a long period.
I used 99 Overall in november Fut Champs. I used to add score in some matches in Fut Champs but only in very few games. I even joined top 40 when i used to add score.
Dont let u fool around, there wont be any Fifa Crossplattforming with PC in the near future, cus they dont want to waste there resources and breath in a game that they release every year new.