Earlier quoted context omitted.
Sure, you can also destroy evidence! This is already a crime we deal with. Encrypting and throwing away the key is deleting with more steps - in fact it is often an implementation detail of deletion in some software systems. It is already illegal, and already something our justice system deals with. No power grabs necessary.
> Sure, you can also destroy evidence! This is already a crime we deal with. That is just assuming the premise. Destruction of evidence is a crime, but destruction of private lawful communications is not. The FBI has no right to a married couple's sexting. The usual case for destruction of evidence is one of two things. Either they produce some emails where you're conspiring to destroy evidence, or that they catch yo…
IANAL or law enforcement, but I don’t see the problem with this system.