[PC] You're in for a treat if you haven't discovered Prey Anti-Theft. I've made a dedicated guest account for it too. I think there's a mobile version also.
All smartphones are protected by Anti-Theft and Encryption, including aMBPr.
Gaming laptop protected by Anti-Theft, but not Encrypted, because Microsoft don't provide BitLocker in Home Edition.
I find Prey for PCs not useful even with that guest account. On my PC i use a BIOS password + BitLocker encryption. On my phone i have CM Security + Android Lost by Theis. Used to use the Avast Anti Theft for rooted phones but sadly it's not supported anymore.