[intended]

You just need to spam people then.

Heck - the original fake news phenomenon was Macedonians (?) making websites that looked like news sites to earn click through money.

People could just do that - “spam from the poisoned well”

[mzs]

If someone shares SPAM you will see it once and then it will be below what you check the next time. You can unfriend someone that shares too much SPAM. You can report it too. There's no good way for an adversary to game an aglo that decides what to put on your timeline more often when the algo is most recent first.