Cleeve, I have to disagree on that point, as I have been banned before for disagreeing with someone and asking them a question about what I disagreed with.
I find that very, very surprising that happened on the Tom's Hardware forums.
Are you sure there wasn't more to it? I'd be really interested to know the details of that situation because nobody should ever be banned over a civil disagreement.
These aren't the apple forums, after all...