When John logs in and posts a comment at Midwest Voices, the above message -- "you can't post comments" -- appears. He was written Miriam Peppers and Yael Abouhalkah to find out the reasons, but hasn't received a response.
So you understand: the Star hasn't deleted specific comments from John due to profanity or abuse or some other violation -- they have banned John from posting entirely.
Seems to me Midwest Voices and the readers' rep blog are the areas at the Star's site where diversity of opinion should be valued the most.
Of course the Star can run their site however they want. But banning critics makes the Star looks weak and pathetic. And like they are clumsily trying to impose a speech code.