I honestly don't think that many of them truly want to know. "Ignorance is bliss" and all that rot. I try to warn of the red flags, and I get moderators telling me to knock it off, and the LBSs seem to say "I don't think she's having an affair, because I asked her, and she said she wasn't," or "I don't think he's cheating on me because he's not that type."