It's the SAME lunatic or lunatic group doing all the spamming. I've dubbed him Riff (Popeye) Raff. He's got a bot generating his Yahoo_ID's, as well as posting his own replies..Yahoo is too incompetent/impotent/ignorant/apathetic to stop him.
Similar ID's?: bot-generated
EXACT same comments as used on other message boards, with only the stock symbol changed?: bot-generated
Plus the added benefit of downloading spyware/malware to one's computer, and giving out your email address to who-knows-how-many similar crooks he sells it to.