How exactly were you a co-owner in the past?
Anyway.
You're in control of whatever you may say or do; not a single person will have you at point-blank and threaten you to spout the nonsense that you've been warned for.
If other players are flaming and misbehaving, leave them to it. Don't get involved, laugh it off and move along.
However, if you choose to retaliate regardless of whether or not it's to a lower or higher extent, you will be held responsible for your actions.
Simple as that really.