I think that after reading this topic the only thing that a smart spammer will gain is valuable info on how to improve his technique to drop a url or a way to mention it.
Also it seems very impossible IMHO to wait several days/weeks just to drop a url.
Of course if it is worth it to mention it then he/she deserves it.
Hope BB moderators will improve their spam blocking policies.
Much a do about nothing..usually in the real worls everything is im/possible.