we have the same thing with some people in the system, but i think they are just behaving like they are because we are doing alot of healing and they are trying to get in the way of it and don't want us to get better, cos everyone else in the system loves this person lots and its not bad at all.
Guess it depends on why you don't like this person, but I don't think it would be right to stop everyone else communicating with the person, unless you think they are not safe with them?? Have you told this person why you don't like them and tried to fix it or reach a compromise?