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cross-posted from: https://programming.dev/post/36063172
this post was submitted on 21 Aug 2025
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That's probably a massive GDPR violation. Automated processing of extra sensitive data like political beliefs and religion is not outright forbidden but it's subject to extra protections.
Nah, I think all of it is literally just public data offered up by users themselves. If you didn't want those opinions shared, you shouldn't have posted them on Reddit.
GDPR also applies to data you get from public sources.
I don't understand.
If someone writes a reddit post and says "I'm fasting for Ramadan," can I not infer from that public post that the user is probably Muslim?
You cannot use an algorithm to correlate it with other data without express consent.
What counts as an algorithm? Surely it can't be the actual definition of algorithm.
Because in most forum software (even the older stuff that predates reddit or social media) if I just click on a username, that fetches from the database every comment that the user has ever made, usually sorted in reverse chronological order. That technically fits the definition of an algorithm, and presents that user's authored content in a manner that correlates the comments with the same user, regardless of where it originally appeared (in specific threads).
So if it generates a webpage that shows the person once made a comment in a cooking subreddit that says "I'm a Muslim and I love the halal version" next to a comment posted to a college admissions subreddit that says "I graduated from Harvard in 2019" next to a comment posted to a gardening subreddit that says "I live in Berlin," does reddit violate the GDPR by assembling this information all in one place?