NEW YORK METS, its not about quantity its about quality, and the majority of met fans who go to Shea are Hardcore, especially the hardhats. These fans know how to get under player's skins, just ask Bonds....
Hands down New York Yankees, all corporate softcore fans, they all jumped opn the bandwagopn and its just pathetic that anyone could even considr them for the best fans. All corporate softcore fans rooting for their store bought team...makes me sick
Also sick of hearing about how great St louis fans are please..... remember the 99 divisional series, who's fans played a bigger part?
Honorable mentions: Philly and Bosox fans
86 Mets. Dykstra, Straw, Doc, Mitchell, Backman, Knight, Keith, Carter, Mookie... most hardcore group ever assembled.