The first hidden features question was asked earlier today.
Now in my opinion these aren't questions that are suited for the WA site - there is no definitive answer for "What little known tips and tricks do you have for x?"
There are a number of points that I have issues with over hidden feature questions:
- What makes a 'hidden feature'?
- Are questions such as these appropriate for the WA site - for larger web apps such as Google there will always be features that users will not know about, and there is certainly no chance of an answer which encompasses every 'hidden feature', so there will never be a 'correct' answer.
- There are already duplicate features listed - such as for the tilde operator (1, 2) and for the site: operator (1, 2) - as questions of this style get longer it will become more and more difficult to find and remove these duplicates.
While I do agree that there is a large amount of good information that comes out of these hidden features questions I don't think that SE is suited to this.
Now I did a fair bit of searching on Meta and there appears to be no real precedent over hidden feature questions, but there seems to be a fair amount of moaning here and here, both for and against. I created this on the MWA because to me it is important to set some form of precedent over whether hidden features questions should be allowed (and in what form) before we have hidden feature questions for multiple applications.