Disrespect is in the eye of the beholder and depending on how an audience and how the speaker reacts, it would not be censorship, but it would still cause quite a stir with all concerned. A lot would have to go out on the part of the disruptor before the tolerance level of a relevant number of people in the audience would break their patience to finally expel someone. I have observed this in real life situations.
Whether someone is spreading a lie would still have to be proven. Notoriously very difficult to prove, but also known to be the easiest thing to say of all those who call others liars who disagree with their own views.
In this blog environment, you don't know all that. The space can be anything in the mind of the person sitting alone in front of their computer, a theatre space, an art stage, a speaker's corner, a self-promoting performance, a podium, a fighting arena etc. etc. - But above all, the user must get the impression that it is a podium or open space with the character of a dialogue (for the sake of comments).
How do you see the permanent exclusion (house ban, to remain in the linguistic jargon of the offline world) of a commentator? Would you say it already carries the potential of censorship?
I see the online space as a huge experimental field where people try to behave humanely without having direct contact with each other.
I don't see any clear rules here. They are interpreted, I think. I am ambivalent about this, I am neither promoting rules nor do I reject them. I play by my own rules, so to speak.
People only have their intellect at hand here. They don't really see anyone, nor do they hear or smell them, nor can they touch them or interpret their gestures and facial expressions. They miss the real atmosphere of a meeting with the individuals and the many.
There may be something going on at a - how shall I put it - metaphysical level and in the cacophony of bloggers, commentators and the rest of the media din, there may be a field that can be helpful alongside all the unhelpful side effects.