I know it has been discussed before - but I don't know what the outcome was.
Would having a paid membership deter some of the trolls?
Who would be prepared to pay to be a member of Mumsnet?
MNHQ - would it have a detrimental affect on your advertising revenue (greater than you would receive in membership revenue)?
How else can we get MN back to how it used to be - it has been bloody horrible lately :(