In these discussions no one will admit this, but the answer is generally yes. Websites written in python and stuff like that.

It's not "written too slow" if you e.g. only get 50 users a week, though. If bots add so much load that you need to go optimise your website for them, then that's a bot problem not a website problem.

Yes yes, definitely people don’t know what they’re doing and not that they’re operating on a scale or problem you are not. Metabrainz cannot cache all of these links as most of them are hardly ever hit. Try to assume good intent.