The GDPR in Europe doesn’t allow you to use publicly available information without explicit user consent, especially if involves personal data.
Even doing some Google Analytics can in theory result in large fines.
For example, while they can't just divulge my name & age in the news, the captions under pictures in news articles can often still have people's names & ages under them without explicit user consent. Tabloids would likely cease to exist if it were any other way. ;-)