Sydney airport seizure of phone and laptop 'alarming', say privacy groups
theguardian.com
theguardian.com
(Looks like the submission was missed; really needs to get to the front page)
But the other side of the coin is having to preclear to justify permission to travel. Owning your own burner is good but for some people won't work. I did a one year peripetetic work-around-the-world and a burner isn't an option for that. You really do wind up wanting private cloud and no cached state sometimes.
The people who have to preclear have state secrets. I don't think many of us carry that burden, it's just fear of being held to account by random circumstances.
... so that any government with enough technical means can (illegally) access the data at their leasure and in such a way that you won't even know it was accessed....