I know this has been posted before. You don't have to tell me.
Scenario: some dude spams your topic or posts hate
Step 1) Ignore it. Don't give them direct attention.
Step 2) Flag it. But, if they're intentionally trying to close a good topic, skip to step 3.
Step 3) Contact a moderator or admin. Email THT, tag a mod, whatever.
Step 4) If it's hate, just know they're jealous and/or attention-seeking, and that you really are great and their hate isn't true.