This was years ago. Troy Brown got a huge return called back for a penalty and the stupid Bosox crowd cheered the box score up on the ticker. Damien Woody was quoted as being really confused why the crowd had cheered that.
No big deal though. This is a region where people chant Yankees Suck at a wedding.
I remember it well. It was a game against the Titans. Still nobody cheered a penalty as you described. And if it was such a big deal and the Patriots didn't want fans cheering for other Boston sports teams then they wouldn't show updates in stadium like they did.