I'd say probably the most hated players in W1 have been the dukes of tribes that have collapsed or broken up. Certain individuals will have pissed off people that are around them, but they don't really have the power to be 'hated' by a lot of people at the same time. I think the candidates for this are mainly people that feel that they were left behind or betrayed by their leaders.
Off the top of my head, I'd say that Sibman, nibbler and Amazon Jim fit that description pretty well. That isn't to say that I like/dislike or have any real feelings toward any of them. I certainly have my opinions about them and their actions, but I think that my reasoning is pretty solid that the "most hated" person would be one of those people.
The person, impersonating himself as a sitter of dsw1's account. As I have found, dsw123 has nothing to do with sitting of dsw1. I have been assured, that a real sitter of dsw1 is a nice man, who would not ever post such a bullshit.