It's worth talking to them to if someone seems to be having a real problem being left out in general but in this case it's very obvious trolling. It's common knowledge that most people have very little CR in their own districts and that this plot will be forcing new CR for most of the game.

If people keep poking back they'll just keep turning every game discussion into talks about cliques and start up a debate about whether there's a problem with them or not so that all people will think of when they think of the game is that there's possible cliquishness, regardless of whether there is or isn't.