I agree, it is interesting to note.
But the fact is that in the NFL, the way the Patriots went about doing it is against the rules. It was nothing new -- it was in the rule book. In baseball, it's not. Whether you, me, or Bill Belichick agree with the rule isn't relevant to the Commissioner...unfortunately for the Pats. The NFL could make it legal, for all I care. Just as long as 1 team isn't gaining an advantage by breaking it, while the others aren't.
...and I know some Pats fans will chime in, because they hear people saying all the time "everyone else does it, the Pats just got caught". Well, I've seen no evidence of that. And neither have you, unless you somehow work for the NFL and have kept your mouth shut from what you saw. I only know of one team that even brought this issue to light, and until the others are proven guilty, that's a blanket, ignorant statement.
Got a little off track there. I do see your point about baseball, and it is funny how the 2 sports look at the same issue so differently.