By that logic, if I start a rumor that Bo is going to coach UNO next year, it automatically becomes credible because 1) Bo is a prominent member of the coaching staff (making it a "big" rumor), and 2) it'll get a lot of responses (all of which will be, "You're full of crap," but a response is a response). That would, by this logic, necessarily mean that it's "a topic of conversation" behind closed doors" with the team, and therefore it becomes more than your "every day rumor."
People seem to forget that rumors about Nebraska don't ALL originate with Nebraska fans, or Nebraska inside sources, or even in this state. Some of them come from Kansas Fan or Missouri Fan or Texas Fan or whomever, who just wants to see the "Nubs" get all in a snit over their made-up rumor. They get a real kick out of threads like these, and all the hand-wringing by the Husker fans.