I have no idea, but I can see how it could be a good thing or a bad thing.
I know in the past there have been posters who consistently post about the same things over and over, or who have a history of withholding key information to get sympathy. In those cases, I think bringing up past threads is very pertinent.
In other cases, I'm sure it would just be obnoxious. Sometimes people change details to obscure the identities of the people they're talking about, for instance. Bringing up inconsistencies like that is kind of annoying, since it's often just a case of forgetting what you named someone, or what their job is.