I think there should be more privacy options. I have some ideas which could be useful:
1- Add an option for posting as an anonym user.
• This setting will be helpful if poster doesn’t want to be found with searches on the internet. Also there shall be a feature for making the past messages and/or topics they created an anonym post. This will help a lot.
2- Add an option for making profile hidden.
• So people won’t be able to find details in your profile.
These are my ideas and there can be a lot more.