It seems to me that a comparatively high percentage of questions have to do with filtering a list, such as removing duplicates or selecting elements of various descriptions. Many of these are probably pseudo-duplicates or at least very closely related. I would like to start tagging these questions to make it easy to find them. The existing list-manipulation tag is too broad to search for these effectively.
I want to be sure that whatever tag is chosen does not conflict with other meanings of the term filter or filtering such as signal processing or pure mathematics.
Do you believe we need such a tag, and is list-filtering a good choice?