I guess there has to be some sort of rule stuff in this space, but don't worry, it'll be an absolute minimum... If you're comfortable with Facebook level censorship then do not read on, this is not your safe space... you have been trigger warned. 1. Don't be a dick - do be respectful (not grovelling respect, that's just weird).
2. if you're about to be a dick then re-read rule one!
in all seriousness though...
Plain criminality, racism, illegal or controlled drugs dealing and explicit material (non-exhaustive list) etc will not be tolerated, any posts which share the aforementioned elements will be screengrabbed and sent to the police, along with your details. It will be for them to contact you. Think before you post.
Oh yeah, personal data.
Other than contacting you relating to appointments or post updates, I do not do anything with your private information. The only third party your information would ever be provided to is the police, and then it's only for breaches of decency in accordance with the above, re; criminality.