People can and will use alts to block evade with no consequences
Blocks don’t actually stop the offender from seeing you and your posts. Alts are things.They actually are allowed to get the last word in an argument because they can respond to the last comment you made to them before blocking them, among other reasons.
Federation enables people to run alt armies to exploit and abuse the upvote system, or masquerade as supporters for their side in an argument to gang up on you. That’s how they block evade with alts and get away with it, by pretending to be someone else.
All brought to you by the ill-conceived idea of federation
Just be careful out there
EDIT: Case in point, that guy down there trollbaiting. People like him will get butthurt and downvote you to hell if he thinks he can get away with it, which he can.