[miohtama]

Any content based filtering has been doomed for the last 15 years.

The only long term solutions for spam are

- Cross-site reputation systems e.g. with public keys

- Paid accounts - can be also in the form of a stake that you lose in the case of breaking the code of conduc

Spam is one of the drivers that killed web 1.0 blogs, self-hosted emails, Usenet, IRC and created wallet garden social media. There is no point to keep repeating web 1.0 mistakes.

As long as Internet stays open and posting and messages are free, spam will just increase, decreasing signal/noise ratio and experience for everyone.