In today's incoming email I found a whole new way you can outsmart yourself:
BE ADVISED: THIS EMAIL CONTAINS ORIGINAL COPYRIGHTED MATERIAL FROM A MANUSCRIPT BY THE AUTHOR(redacted); COPYRIGHT 2014. ALL RIGHTS RESERVED.
Putting anything like this on your email flags you as the rawest of raw recruits to the Publishing Horde.
It also tells me that you think manuscripts get stolen so often that you need to make sure to warn everyone not to do it. That's the first sign that you're this guy
You never need this on a query.