In most countries, border security isn't entirely free to run rampant over your basic freedoms. Privileged communications (eg client/attorney) is an extremely important basic bastion of freedom and law, and violating that (which in this case seems incidental, not intentional) is a mockery.

Sure, any country is welcome to violate that norm, just the same as any country is welcome to force it's people in labor camps for insulting Dearest Leader. The rest of the world is also welcome to respond appropriately.