I'm quite certain Sherman cares what people think of him. I'm convinced that he's one of the smartest guys in the league. He came in as an unknown 5th round pick a couple years ago and now he's viewed as the best corner in the league. Is he? I don't know, he's very good, but I know a lot more people know his name and THINK he's the best corner because of his trash-talking exploits. He's going with the theory that the best way to maximize his income is to be loved OR hated, but never ignored. It's working (see this thread). He's the Hollywood Henderson of his day, hopefully (for his sake) with less coke.
Care that people hate him i mean I highly doubt he cares lol.