Did the Patriots ever steal signals?

lets look at the facts:
1) Rumours are that teams (including the Patriots) do this all the time.
2) Mangini was on the Patriots staff when they were supposedly doing it
3) Mangini knew they were filming (the footage on TV last night of the huge camera behind the Patriots bench was about as well hidden a secret as Liberace’ sexuality)

So, clearly the intention was to scare the opposition that they could steal if the opposition doesn’t change signs or screw up the team up when they keep changing.

The Patriots were the victims more often, especially during last year’s Dolphins game which cost them a home AFC Championship game against the Colts. Should the Colts hand over the Patriots 4th Super Bowl ring today?