The media literacy organization Commonsense Media produced this lesson plan on the effects of posting information about others (and vice versa):

The situations discussed in the lesson show how important it is to keep up a conversation about online privacy with your friends, family, and peers — to protect them, and also yourself!
https://teachingprivacy.org/resource-for-high-schoolers-how-we-affect-each-others-information-footprints/
teachingprivacy.org
crawl=CC-MAIN-2020-05
26216
application/http; msgtype=response
sha1:XCT76QM4ZBZC5REL2ROFP2Q7AACITBA3
<urn:uuid:6a2933af-d8bb-4649-8c86-13ff7ddec6d6>
2020-01-20T14:15:33Z
199.16.172.135
text/html
sha1:J3K3S64A3C35DRKWW7TO33HETLJJW7NR
<urn:uuid:86fabebc-e28e-4ceb-8447-01419bf15eb6>
https://teachingprivacy.org/resource-for-high-schoolers-how-we-affect-each-others-information-footprints/
response
<urn:uuid:8481fd26-1718-405c-8561-d13776fd996a>
isPartOf: CC-MAIN-2020-05
publisher: Common Crawl
description: Wide crawl of the web for January 2020
operator: Common Crawl Admin (info@commoncrawl.org)
hostname: ip-10-67-67-129.ec2.internal
software: Apache Nutch 1.16 (modified, https://github.com/commoncrawl/nutch/)
robots: checked via crawler-commons 1.1-SNAPSHOT (https://github.com/crawler-commons/crawler-commons)
format: WARC File Format 1.1
conformsTo: http://iipc.github.io/warc-specifications/specifications/warc-format/warc-1.1/