Guest Account as Thief Trap in case of losing MacBook One week ago my MBPro has been stolen, and unfortunately no "Where's My Mac" like's helped.

My idea for securing my next MacBook is to create Password-free/guest-like account in case of another bad luck.

When thief will open the lid, he will log in, and maybe some installed software will take picture from front camera? Maybe some keylogger will help? Maybe some sneaky Prey-like software in background?
What do You think?
How to find my Mac even if my someone will reinstall the OSX?
There is some literature out there for you (e.g.here or here). Basically there is different means of protection. 


Locating the device (Find my Mac)
Surveillance apps (also have a look at the OS X Back to my mac, which reportedly freed some Macs from their thieves)
Data security / encryption (e.g. Filevault2 encryption, Firmware password)
Physical protection (e.g. Kensington lock)


Watch out when using Filevault2 for Full Disk Encryption. This will make your data safe but will maybe not lure the thief into reveling his / her location, since only a limited version of OS X is booted.

Setting a firmware password will prevent others to boot different disks.

But watch out. These features (filevault and firmware password) require more care with backups, etc. The risk that you lock yourself out is significantly higher.