...but I suppose there will always be such people.

I don't believe I've ever met a charitable libertarian or anarchist, and we seem to be lousy with both.

So the best thing to do is try to define a set of blockchain rules that limit such abuses as much as possible.

I believe it's important that any RULES are universal, applying to every account equally, and not "special cases" or "based on the whim of the appointed enforcers".