No, this won’t interfere with the right of a defender to know who their accusers are and the nature of the charges and evidence; this advice is about protecting privacy from the general public.
I honestly think accusers should already know to do that; it’s common sense to delete all social media content, maybe even deactivate accounts. If the people-finder sites have one’s correct phone number, employer, and home address, seek professional help clearing it.
There is nothing wrong with protecting one’s privacy online; I support it 100%.