There are currently only 8 users with the 500+ rep required to vote to close questions, and to actually close a question 5 votes are required. With that in mind, I think it might be best to have a meta thread where people can post a link to questions that need to be closed. This was something that was done in the early days of CSTheory, so I'm copying them. The basic idea is for high rep users to have a single place that will tell them of any questions they might want to close, so that they get enough attention, rather than surviving by simply being ignored. If there is some dispute over whether a question should be on this list, then discussion can take place in the comment thread for that answer.
Please post only one problem question per answer. If we down-vote resolved questions, then the fresh ones rise to the top.
Note: There is no onus on high rep users to actually close questions listed here. It is merely a way of drawing attention to problem questions.
UPDATE: Since we now have moderators, this thread is no longer needed. Please flag, leave a comment or vote to close to provide feedback on questions.
This post has been migrated from (A51.SE)