Isn't there a rule about a clans thread being for people in that clan? and if members of that clan don't want you there then you need to leave?
If there isn't there should be. I did something like that back when I was a mod, it cut down on a lot of drama and people poking at each other.
Think of it like someone hanging out on their porch and you going up and talking to them and bugging them and not leaving when they ask you to.