IO9 has a set of provocative rules for "fan husbandry" — nine things creators should do to keep their fans active (if not, you know, happy or satisfied):
Fans love inconsistencies. Fans claim to hate contradictions in long-running stories, but actually that stuff is catnip to them. If Londo Mollari says he has seven penises in one episode and then refers to his twelve penises in another episode, the fans will spend hours coming up with explanations for the discrepancy. Marvel Comics realized this years ago, when it started sending "no prizes" to fans who could come up with the cleverest explanations of continuity goofs. So don't worry about trying to be consistent with old stories. Just ignore them, and let the fans worry about them.
