On reddit, I often collapse long threads of comments if I'm bored of reading them (I have neither the time nor the attention span). It has no bearing on their quality.
Something that I always found a problem was getting "stuck" in the middle of a huge comment chain of irrelevant content, so I made a chrome extension to fix it:
On reddit, I find [personally] most of these threads are never-ending chains of well-trodden memes or loops; this isn't something usually encouraged on Hacker News. If a thread is boring or doesn't pique curiosity it probably isn't too encouraging.
