1. Readers come here for articles and discussion, not trolls.
2. Trollers create multiple accounts, abusing features intended to help newcomers,
but trolls force us to filter at a higher level, making it harder for newcomers to be heard.
3. Trolls are basically spam or graffiti, making same lame arguments that they're 'free speech'
4. Trollers preceded moderation, but blame moderation for their acts.
5. Many trollers moderate inappropriately and metamod punitively to impede open discussion.
6. Trollers have organized [slashdot.org] to disrupt /. discussions.
7. The deluge of trolls has made readers less apt to appreciate humor and on-topic satire.