There's some inspection in practically every transport hub when I travel. While I traveled internationally the most strict was in Germany. I really don't mind a lot - there are good reasons to be careful - but they had guards in full military gear and with automatic weapons (usually it's handguns and plain uniforms) which looked pretty intimidating, and that was the only time I had to actually turn on my laptop to show it's a working laptop and not some kind of trick. Maybe showing how strict and tough they are was the point. The worst inspectors I had were in London. They were exceedingly slow and had very unpleasant manners. Maybe just my luck. Never had any real problems though - worst thing they got a look on my underpants and power connectors, and sent me on my way.

Conversely, as an American, the only time I've had my luggage poked through was coming back into the USA. I don't remember if they were armed though.

The only time that you’ve known of! Fly with locked luggage and see how often that lock stays intact.