So me commenting on threads that were here before I joined is frowned upon?
Sometimes people re-animate threads in ways that can:
1) cause topics already beaten to dust to make like (supposedly) Harry in Ghost Story;
2) because of new members, cause new battles on old topics, which makes the mods homicidal; and
3) generally re-invent the wheel in annoying ways.
So if there's an ancient topic you feel you'd like to comment on, a winning strategy might be to wait until Ghost Story comes out and insert it in the millions and billions of new threads that will pop up.