Don't reply to a message if you're not addressing its content. If you want to send a new message to someone, use the Compose function. Don't forward jokes, virus warnings, petitons for 'good causes,' or other similar material to email lists. Don't send personal email to email lists without asking the original sender's permission. Think before you flame.
Many people find it much easier to be more aggressive with email other forms of communication.
We've all flamed someone one time or another. Sometimes it can be fun, but it has gotten people into trouble. If you still feel as strongly, well, there you are. Do not use your NWE account to send 'flame' messages to anyone. Hostile, harassing, or threatening email is a violation of UF's acceptable computing use policy.