[...] it would be helpful if the team leader at least could be given a heads up on what has gone wrong. It would also be an opportunity to provide a cautionary word to fellow teamies, to ensure they don't make the same error.
There's not much to remember if you do not want to get banned:
- Do not cheat.
- Play only one account.
- Be reasonably polite and do not insult anyone.
- Respect other players and their privacy.
Note that it is very rare to get banned for inadvertent or negligent violations of the ToS. To get banned without a prior clear and specific warning will require a significant intentional breach.
We do not discuss the specifics of why players get banned or leave - if a player wishes to disappear without prior announcement or saying why, that's their decision. This is both for privacy reasons and to protect our games.