This is someone who tried to connect with me and it says.
"By connecting you will be able to explore each other's personal and genetic information, which may reveal surprises. Learn how sharing works."
And if one clicks on the learn link, one sees.
"Establishing a sharing connection on 23andMe allows users to view one another's profile names and information (including profile sex), information from compatible reports, your predicted relationship, and the number and location of overlapping DNA segments. A sharing connection does not allow either person to search or download the other person's raw data, access their DNA Relatives list, or if applicable, view reports that require an additional consent, or view and download the other person’s Reports Archive."
I never established any sharing connections and assume the same for most.
Which is probably mostly already pretty discoverable through public records, obituaries, and genealogy sites.
It's not like 23andMe is telling you that your third cousin has some specific genetic risk for a disease, right?