I agree with this.
Lots of teams harrass refs - although less so nowadays than a few years ago - but Chelsea/Mourinho for me take it to a whole nother level. It seems a very deliberate, premeditated, calculated tactic from his teams, that the entire squad/staff will unite in outrage over something, with the "victim" (Oscar in this case) doing everything they can to exaggerate and feign injury as well.
I dont think it was ever quite as organised or calculated with us (or most other teams) - it was more just like Fergie said "Put a bit of pressure on the ref in the first half and maybe he will give us something", whereas watching Chelsea it looks literally like a theatre production, scripted and everything. Hell you could probably go down to their training ground and see them doing dress rehearsals. I can imagine next game they might have a practice run in the pre-match warmup, just to really make sure they are all on their A-game, so to speak.