There have been multiple tweets that reached the front page in the last 24 hours that were quality, substantive, relevant to HN content.
I’ll admit I do use Twitter (and HN!) a lot, though.
Here’s one with 600+ points. You’re telling me we should block Twitter on HN. I’m saying that’s a bad idea for HN. Seems like the users of HN agree with me. HN is for all of us, not just any one user’s preferences.