Nah, your right to keep debating ends when someone else decide's they're not a platform for further discussion.

No longer being able to reply to the blocker, and ideally not even being able to see the blocker is the ideal, and both the blocker and the blockee should need to agree to reopen contact for the block to go down.

Like a restraining order, stops the original blocker from raising and lowering it at will as a harassment tactic.