Comment Nevermind the circumvention (Score 1) 75
For almost any use you might have the biggest threat to the security is going to be all the ways that your communications can be compromised while you are actually using it. Baseband exploits, protocol exploits, software vulnerabilities, poor or crippled RNGs, compromised platform or application updates, cloud storage of sensitive information, etc. etc. the list goes on.
Oh what? It can self destruct? It's probably way too late by then, and assuming it's been compromised the attackers would probably rather you keep the thing. Less work for them!