I'd like to at least try get into a grown up discussion with them about what they're saying.
To explain that decisions go both ways. Yes we've had a lot of luck down the years, Mendes' goal being disallowed, amongst others. But let's not forget the ones we've had against us, such as Newcastle's penalty.
I'd also like us to point out to them, that most of what they're saying about the league being corrupt (more so, Fergie being corrupt), is libellous, unless they have proof of such outrageous allegations, which I highly doubt they do.
In fact, anyone from BM reading this, please, provide us with your proof that Sir Alex Ferguson is corrupt, by making payments to the FA, or something similar. Go on.