So far we've just had word of the policy for behaviour. For interventions Facebook's code of conduct explains that an intervention would happen of there have been multiple complaints, banning is unlikely to happen with any single infraction but I guess it depends on the severity.
I totally agree that interventions need to be graduated depending on what's happened. That's probably why the record facility will be implemented in Horizon so users can provide something that can be properly judged.
Allowing a teenage member of the family for example to use your account to interact socially with others is going to be the responsibility of the account holder. The more social abilities VR has, the more responsibility the account holder has.
