Not too long ago a user asked for the differeces between four similar words. The question was answered three times within two days with relatively good answers, albeit none accepted.
A further two days later, he realised, that there is another similar word and decided to extend the question to include that fifth word.
I commented saying that his question was pretty old, had gotten answers and was probably out of sight for most people now. I also felt that this turned his question into a ‘moving target’ aka hard to bullseye with an answer. I haven’t, however, found a general policy on the topic so far.
Should this kind of late extensions be allowed?
If not, how should a user who realises that their question didn’t include all the related terms and wants to add more act? Ask a new question with reference to the old one?
Also if not, what should we do to askers that do that? Rollback and add a comment? Just comment?