A good friend of mine is a well known member of the media that covers the NFL. His articles have been posted in this site before. Talking to him before about this subject, I can tell you that T.O. IS hurting Werder. The number 1 job of a reporter is to get quotes from a principal of a story. If that reporter cannot get quotes, either off or on the record, for whatever reason, that reporter's assignment is terminated. He, or she, is issued another assignment and replaced by somebody who could get them.
Believe it or not, players, particularly star players, have tremendous power over media members and they can make or break anybody.
T.O. not addressing ESPN's reporters just gives FOX, CBS, NBC, Sporting News,..etc, more leverage. It might not be that big of a difference because the NFL has other stars, obviously, but he's one source, and a very important one at that, the ESPN cannot count on.
Believe me, ESPN is not liking this one bit and I'd bet that they'll start working through back channels ( if they haven't started already ) to get T.O. to address them again.