Privacy by default: how to make sure privacy display settings are disabled by default?

Hello everyone! In the community, as a user on profile settings you have the option to checkmark several settings, such as 'allow private messages from connections only', visibility who's online and share bookmarks. Also (especially) the setting 'show in search results' is something I would like to have disabled by default and let users checkmark and choose for themselves if they want to be shown in search.

How do I configure these settings and make sure they are by default unchecked/off? 

Thanks!