> There's nothing inconsistent with the view that sure one is within one's rights to do such a thing but that it is still bad, and that one might, to the extent that one can within one's own rights, take measures to discourage such a thing rather than just accepting it as "Well it's within their rights so it must be OK".

Sure, but ultimately, if the other party to the discussion refuses to agree, you need a decision rule.

If your views are largely about that decision rule then you look silly for not accepting it.