What is the best way to respond when someone asks more than one question at once?
There has been some discussion in the past of circumstances under which this could be an appropriate thing to do. My current question is, what is the best way for me to respond in cases when, in my opinion, it was not an appropriate thing to do?
One obvious thing to do is leave a comment suggesting that the questions be re-asked separately. This sometimes works, but often the advice is not taken, and if I also want to answer one (or more) of the questions being asked then I have to wait to see whether the advice is taken or not. Also frequently other people go ahead and answer one or more of the questions, and then the asker is even less motivated to do the right thing by splitting them up.
One solution would be if people with post-editing privilege (or perhaps even higher rep than that) had access to a "split question" feature allowing them to split a question into two separate questions, preserving the original asker on both. If the question has already been answered, then ideally the question-splitter would also be able to choose for each answer whether to place it on one or the other of the resulting questions or whether to split it into two separate answers one on each question. However, it seems unlikely that anything like this would be implemented, since it would probably be a lot of coding.