Since the poll doesn't allow much text, let me elaborate the options a bit.
- Friendly fire should be totally disabled, like in UT. (-> Skill-less stupid spam-o-rama IMHO )
- FF on, but people who teamkill excessively should automatically be kicked and temporary banned from the server.
- FF on, but there should be an intelligent vote feature (á la Tribes' or BDBMapVote) that allows you to vote lamers off the server.
- FF on, but with 'mirrored' teamdamage, i.e. if you hurt a teammate, then you take a part or all of the damage (percentage to be decided by server admin).