Dodi if you do not intercede with the boiler room that has targeted your company they will dominate the board and insure that those who come to the board have the impression that your company is a piece of crap.
Is that possible? Yahoo does not seem to care that their integrity is being compromised by all this bogus stuff being posted. Lots of boards have it, and from the same people.
It does seem that Yahoo is not concerned with the integrity of the boards. I would suggest that you contact the IR department and get them involved with the boiler room issue.