On a sidenote: why can't we comment on these? I have a feeling I know why, but I need to hear someone with a YC shirt on say it.
If there is a news story, a "my experience at company X" blogpost, any kind of relevant point to be made about that company, someone could submit that as a story.
Letting people comment on job ads would just turn them into lightning rods for whatever bad things people want to say, and then what would be the point?
I'm sure I have seen a moderator reply in one of the who is hiring threads saying something similar that allowing comments just attracts criticism and derails the threads
Hearing whatever bad (or possibly good) things people have to say about company X is exactly what I would want and would greatly increase the value, of those posts as well as my likelihood of clicking on them.