This seems like bad form to me. I'd rather have that list full of real questions that people actually care about. Can closed questions be removed from that list?
Yes. This can be accomplished in one of two ways:
- Delete the question. This is probably obvious.
- Put a historical lock on the question. This is a special status that moderators can place on a given question, which will preserve it and all of its answers on the site but prevent any future modifications. It will also remove it from all default lists - you'll still be able to find it by searching for it, but it won't show up to casual readers.
Option #1 is preferred for questions that have simply outlived their usefulness. Option #2 was created explicitly for questions that are/were enjoyable and worth keeping around as a reminder of the site's history, but which shouldn't normally be held up as examples of good questions.