Although I try to not make any personal, ad hominem attacks upon named individual persons. I cannot say that I have never been guilty of it and if anyone perceives that I have done so I apologise. I have always striven to use the pronoun 'one' rather than the more personal, accusatory 'you' in my posts in order to avoid making specific attacks against individual people. You seem to acknowledge this, thank you for that. 
There are, however, some very subtle ways of trolling and remaining within the CC definition of what constitutes a 'civil' comment. BroThor, to his credit, has just recently taken to task a poster who has relelentlessy pursued another commenter with a combination of cunning sarcasm and covert invective none of which would have fallen foul of CC's definition of uncivil.
If individuals want to block others from what they want to receive themselves, fair enough.  They have no right to decide what the rest of the forum is privy to.