See this app for the Kindle Fire HD to secure your device:
http://www.amazon.com/Lookout-Mobile...okout+security
If it's stolen, you can lock it and locate it and provide a return address.
I just checked the one star reviews on this App and they say it does NOT work as described for the Kindle Fire HD. Thus, if you install it, try it out carefully and uninstall it if it does not work for you.
After reading the one star reviews I decided not to install it. It does have a premium app for cell phones which appears to work better for about $ 30 per year.
I'll wait a year for improvements and then try it out.
Of course if its stolen and the thief does a factory reset, that app will disappear along with all the rest.
The best approach to a stolen Kindle is to contact Amazon and report it to them. Then that MAC address will be recorded as stolen and it can never be used with Amazon material.