Forgive me Nemesis, for rising to the bait, but a while back you (quite reasonably) criticised me for quoting the Laws of the Game as the reason why a foul challenge in the middle of the field should be treated equitably with one in the penalty area.
I think that - in that case - there was a general agreement that while I was right in Law you were right in "reality".
In this case, you are right in Law, but in "reality" some players just happen to be in the wrong place at the wrong time and pick up a caution on behalf of the persistent (and probably pre-meditated) foul challenges committed by his colleagues.