> reading a 100 pages thread will get me a Threat message for every page!
WHICH thread?
As you seem to say, the forum is clean, but members can insert stuff from other places. "Constant" red-flag raising is more likely Avatars, because a person may post on many pages of a thread.
The avatar image itself may be innocent. Your nanny is probably (as Alexc says) complaining about the larger site that the image is served from.
Example: say I find a suitable image, and it happens to be served from a porn site. If the nanny is set to object to porn, it will raise the flag, even if the image itself is sweet and decent.
If you *possibly* can, isolate which avatar is triggering your nanny-gate.
Either way, report to Ethan, the forum supervisor. He can at least blank a member's avatar, then contact them to select another image (and host).