I don't know, but they should. This past episode was the third time in a row that someone let her in on a perfectly good plan, and she went a-runnin' immediately to Philip and ratted them out. The first two people got voted out; Malcolm got off lucky by having his plan submarined and losing an ally and an immunity idol.
I can't stand Dawn. She's the kind of terrible player who has no chance of winning but no one wants to get rid of because they're "nice" and non-threatening. She's also melodramatic and irritating. Ugh.