1) When you come across a consistent troll, make them your friend, so you can keep track of their posts.
2) Equally important, continue to make your friend's friends your friends. This ensures that once your Karma falls to -1 fellow trolls will be able to read your comments (see point 3), and the word will get out.
3) In your Comment Preferences, adjust the friend and fan bonus at +6.
4) In your Comment Preferences, adjust 'interesting', 'informative', 'funny', 'insightful', 'offtopic' and 'redundant' at bonus -6.
5) In your Comment Preferences, adjust 'troll', 'flamebait' at bonus +6.
6) In your Comment Preferences, adjust the threshold to 5.
This final step ensures that you will only read comments by fellow trolls, or that have modded down for troll or flamebait. You are now part of the revolution.
Viva la revolucion!