So your argument is that something that's not a problem to do shouldn't have been done, and that the Patriots shouldn't do what every other team can do?
That's silly. They got cleared for the piece and, by all accounts, the sideline footage is nothing you can't get from network or all-22 film. The problem is that the Bengals weren't let in on the situation. Had they been, this likely would have gone off without a hitch, even with the vile and evil Patriots being involved, because then the Bengals guy on site could have said something like "OK, I think you've got enough of that footage" instead of "The damage is done, my friend".