I heard that Sherman hated Harbaugh from Snodfart days and that was part of his overall animus over the years. And it was because Harbaugh didn't consider Sherman's ability to play a different position than he was assigned. Just radio noise but in a similar vein to link above.
After living through the dreary years of having the Niners make me want to hate NFL football, I ended up kind of lamenting the decline of the Seahawks. They were always a dirty team, highly penalized, but their defense was one of the most scary and effective squads since old Raider days and I respected them. I can't figure out why Carroll and ownership has lost ability to retain what they had going, but it was a great team for a while. NFL=Not For Long is the appropriate meme but they did have a good run.
To me, Sherman is having the best last laugh. He will now collect salary in a diminshed physical state from the team he humiliated. he is Charlie Sheen winning big time, though its a modest contract insofar as terms for him to collect. And I'll cheer the guy. He's smart and the Niners need some fire and leadership.