Pretty much every social media app has a "Member since X" visible on public prof...

mort96 · 2025-12-15T12:22:42 1765801362

Who said I was talking about social media?

nish__ · 2025-12-15T12:25:20 1765801520

Well where else do users have public profiles?

0x3f · 2025-12-15T12:35:24 1765802124

The whole point though is that the ID itself leaks info, even if the profile is not public. There are many cases where you reference an object as a foreign key, even if you can't see the entire record of that foreign key.

nish__ · 2025-12-15T17:49:47 1765820987

I can't think of any.

strbean · 2025-12-15T21:00:08 1765832408

Sending a friend request is an obvious example.