You know you're addicted when...
OK, how about some kind of score / table where you can see just how bad your addiction is, compared to the rest of the MNers on here ?
Would that be too scary ?
Most Posts in Last 24 hours
Most regular poster over last 6 months
etc.
If the idea of publishing them seems simply too horrid, maybe you could see your stats / 'score' only when logged in rather than on a public page ?
mumsnet: like crack... only worse (TM)