It's a non-useful and self-damaging trait that most people seem to have: yell at others to try to make them behave in a certain way where they can instead take actions on their own to ignore/avoid those behaviors.
This shows up all the time at work where people complain that they are getting too many slack messages or emails. You are not some hopeless caveman who has no idea what a computer is. Set up a filter and send everything you don't like to trash. Silence your notification. Mute/leave channels. Oh right, you are also a software developer. Write code to automate the above.
> There is no need to abuse the maintainer, repeatedly post the bug, harass them over twitter.
Block the user on GH/Twitter! Lock the conversation. Write a script to do the blocking for you automatically (Twitter and Github both have APIs for that - that should be a hint that this is an intended use case!).
If you have already identified someone as an abuser, any response, negative, positive, dismissive or otherwise, is only going to encourage the behavior - that is a well studied pattern. Writing a post and having it end up on HN does the exact opposite of what you hope it would. Someone reading your post is going to specifically go out of his/her way to fuck with you.
Instead, just ignore.