> Police cannot access your E2EE DMs with a warrant.
They can and do, regularly. What they can't do is prevent you from deleting your DMs if you know you're under investigation and likely to be caught. But refusing to give up encryption keys and supiciously empty chat histories with a valid warrant is very good evidence of a crime in itself.
They also can't prevent you from flushing drugs down the toilet, but somehow people are still convicted for drug-related crimes all the time. So - yes, obviously, the police could prosecute more crimes if we gave up this protection. That's how limitations on police power work.
If you are pretty confident your under investigation then this is might be Obstruction of Justice and that's pretty illegal.
Uh, it absolutely isn't? WTF dystopian idea is this?
Well the kind of can if they nab your cell phone or other device that has a valid access token.
I think it's kind of analogous to the police getting at one's safe. You might have removed the contents before they got there but that's your prerogative.
I think this results in acceptable tradeoffs.