It's like they have all been programmed to say that Pav and Zoe are not to be trusted, when we have seen very little sign of this (very little of Pav full stop really). Sure, they have seen the show up until now, they are all aware of that, and are obviously going to have some inkling of who they do or don't like and know things that others don't, but that doesn't necessarily mean that they are not to be trusted.
After all, what exactly do the others think that Pav and Zoe can do that will cause them so much harm?