If "everyone" filtered such persons, there would probably be no issue;...
sophist, and therein is the answer -- and for yourself, it would work equally well. iHub has provided the mechanism for control of so-called disruptive posters.
You seem to be saying that for posters with lack of self-control who feel compelled to respond to so-called disruptive posters or refuse to use the filter so as not to have to read such posts, you want iHub to impose another mechanism so as to control posters you find objectionable, but who otherwise meet iHub's User Agreement.
Have I summarized your position correctly?
AK