I just added a new tag to one of my own questions as a test to see would this put the question at the top of the questions sorted by activity and it did.
I don't plan on doing this, I just wanted to see would it actually work.
Is it frowned upon to be editing your own questions just to put them to the top of the pile to gain more publicity and possibly more votes? Or can this be seen as a way of getting attention for a question you really want answered without having to give a bounty?