You have “centralised democracy”, a form of democracy where decisions, once debated and adopted, are implemented uniformly throughout an organisation. They are not debated a second time, and there’s no room for dissenting against decisions already made.

It’s a double-edge sword though: if something you dislike gets votes, it’s never going away.

It seems to me that "no and don't ask again" should be a possible outcome of a vote on proposed legislation.

Without going into full detail on the procedure I'm imagining, such an outcome would bar consideration of equivalent legislation for several years and require a supermajority at several stages of the legislative process to override.

Great comment, thank you. I know that I could simply upvote, but this deserved more.

Read about the paradox of tolerance.

I'm not saying you unalive your opposition, but you do need to make them suffer consequences if they push the boundaries to get what they want.