See, I don't really understand this. Why would you block someone on an advice site? Unless they're constantly harassing you, s]for which you report them to admins, I don't think we should be blocking people when they could be giving you good advice.
The only way you can "block" someone on FunAdvice is by simply stop them from following you.
I don't think YOU can,but you can talk to one of the advisors about it. I recommen Colleen.
Go to their page and "unfollow" them.