There is currently a tag for fake. While looking through the questions tagged with this, I find that it is used as a synonym for mocking, spoof/spoofing and even url-rewriting, as well as a wide range of fake things (fake cookies, fake CA certificates, fake mouse/keyboard input, fake email-addresses, fake headers, etc). At the time of writing there are 81 questions tagged with 'fake'.
This tag seems to be solely for meta-information about a question, or it is being used when an other tag is more appropiate. I think in most cases the tag should be removed, and in specific cases it can be re-tagged with the tags above (if that wasn't done already). Then this tag should be burninated.