In Mathoverflow, people can ask Big List questions which are "questions designed to generate a "big list" of certain results, examples, conjectures, etc. via many individual answers, each contributing one or a few instances."?
In particular, it implies that people are encourage to give relevant answers even many other ones have already been put.
If you want examples of such questions :
Is it authorized to ask such questions in this SE?
If yes, should it be flagged to be in Community Wiki mode (like in Mathoverflow)?
Can it be interesting to add a such tag?