Hi,
Again, this is not as easy as it sounds. First of all, it is not always that easy to be certain someone is trolling and erring on the side of deletion may result in the board losing a poster.
Secondly, not all trolling posts are bad, some start very interesting discussions.
As for 'no trolls, no flames', rather than flaming trolls try ignoring them, works much better.
Sanuk!