[phyllostachys]

Incidentally, it was this comment thread that led me to find this[1] for the same reason you list. The lack of collapsible threads has bugged me for a bit and I have been considering doing my own bookmarklet for a while but never got around to it.

[1] - https://github.com/akirk/hackernews-collapsible-threads

[chrisan]

Sweet, thank you!