He was trying to avoid folderolling a thread and his own thread is suffering the same fluffy fate.
Could you explain the highlighted group of words.
Traditional songs often use nonsense syllables to make up the metre. Examples are 'fa-la-la', 'tra-la-la', 'hey-nonny-no'.... One of these traditional nonsense phrases is 'fol-de-rol'. Possibly 'folderolling a thread' means adding posts to a thread that do not add to the useful content'
'fluffy fate' is another phrase that is new to me. Possibly it's analogous with 'fuzzy logic' - logic that is ill-defined and not rigorous.
So, if my guesses are right, your sentence means "he didn't add his comment to one thread because it was irrelevant to that, so he opened a new thread to discuss his point. And his thread received irrelevant posts from people who didn't follow the same principles of 'good netizenship' [i.e. like 'good citizenship', but on the Internet].