Have you considered that a law being "flexible" and "able to move with the times" is exactly why someone wouldn't like it being vague? A law that is "flexible" means that it's a law that can be arbitrarily applied. A law that can "move with the times" means that what might be fine now won't be fine later and just maybe you will be the first to find out.

It doesn't matter if European law has a history of being "principle based", if it can fuck you then someday it just might. Europeans might be fine with this, but I think most Americans would not be. If I was in OP's position I would do the same thing, by simply blocking an IP range all possibility of being made an example of by some people from another continent is flushed down the drain. I'm absolutely baffled why people think this is absurd, if you're not even making any income off of it, why would you ever open yourself up to such expensive potential liability?