First, thank you Matthew and HN for a great resource.
Re metadata, please don't "require" it. I agree it would be nice if posters could find a more search-friendly way of saying "no remote", but I think it would be a huge mistake to impose any sort of format or content requirements, or any other barriers that increase the hassle for posters. Even something innocuous like "please read these simple guidelines before posting", and I would predict the number of posts will go down significantly. Our goal as programmers should be to write filters that can handle free form data, within reason, not to force humans into rigid forms for the convenience of easy filtering. Please don't surrender yet another valuable tool to the HR everything-must-fit-in-its-box mindset.