Can you block obnoxious users from commenting on your questions on fluther?

No, you can’t as far as i remember from an earlier, similar question.
What you could do, when that user is commenting on your question and the answer is in any way not in accordance with the guidelines, is flag it, and hope for the best (response being modded away).
Or, when you see the obnoxious user’s avatar, close your eyes and use your mouse wheel to scroll the page twenty centimeters down and you can open your eyes again now.

This came up a few weeks ago http://www.fluther.com/92212/what-do-you-think-of-a-blocking-feature-on-fluther-to/
I hope the link works, I don’t really know how to do this.

I just tried it, it seems to lead to the right place. Hope it helps.

@JilltheTooth
This link might comein handy for you.

@rebbel : Thanks, Darlin’ ! That’s just what I need.