It’s a little schizophrenic, but I try to limit my like or dislike within any particular thread. I might argue vehemently with a person one place, and then staunchly support him/her in another.
A Fluther Question is too narrow a place to define people in… even simply whether you dis/like them.
Of course, over time, if someone doesn’t ever seem redeem themselves in your eyes, well… do what you gotta do.