Right decision but as a Chelsea fan there how shit must it be. Imagine city equalising late in a cup final and you unsure whether to bother celebrating.
Wasn't it used in all Premier grounds ? (as they are the only ones with it )
I don't know, but surely you can't have one law for one team and another for someone else in the same competition. Yes I know 2 PL teams were involved today, but the same applies to all.