I've encountered lots of questions on SO which aren't very well phrased or don't contain enough information to exactly understand what is being asked. If the question is interesting it's followed by one or a few comments from users asking for clarifications or additional information which... get no response, none whatsoever.
The question is simply abandoned by the OP.
What might be some ideas to improve this and encourage the OP to respond? I'm thinking something similar to flagging the question with "needs extra info" that adds a link to some page in the FAQ to explain to the OP what to do next.