http://ycombinator.com/newsguidelines.html advises making certain changes to titles, and says you can make up your own titles, and said "Please don't do things to make titles stand out". There was a warning that a submitted editorialising title may be edited.

I generalised that to changing any link-bait (or otherwise unsuitable) title to something that better fits the intent of this site, which I think is a good guideline.