Can anyone cite a successful prosecution for, say, 18 USC Sec. 2 (aiding and abetting) where the forum administrators strongly suspect, know, or should know, that the non-licensee sellers are "engaged in the business of dealing in firearms . . . through the repetitive purchase and resale of firearms” on the web forum but nevertheless permit the seller to post the listing? BTW, I'm NOT referring to THR - I haven't looked at any for sale posts here. I am an attorney but have not dealt with this area before (knowing aiding and abetting by web forums, websites, etc.). I've seen accusations and dismissals under some statutes but not under firearms laws. Thanks.