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Very quick examples, if I can check if an email address is registered on a site I can 1. Identify people who are gay/bi (e.g. signed up to grindr) 2. Identify
by IanCal 9y ago
Very quick examples, if I can check if an email address is registered on a site I can
1. Identify people who are gay/bi (e.g. signed up to grindr)
2. Identify political affiliations (depending on site)
3. Identify health issues (signed up to a mental health forum, or cancer support group, etc)
These things people might be happy others knowing, but I hope you can at least see some cases where you might not.
- RamenJunkie_ 9y agoYou could also potentially build spam email lists too, to target users of that web site, if you automated some system that guessed emails addresses and filed away the ones that come back as registered.