Oh, my bad at that, got a brain fart I suppose. Sweeped surveillance (which is usually SIGINT) is not minded, and often the backbone of programmes such as Five Eyes relies on that. Targeted surveillance (SIGINT cases that I mentioned) and espionage (mostly HUMINT) is frowned upon. HUMINT is especially frowned upon since it means you're actively investing in recruiting citizens against their government, and the intel is usually much more valuable and more expensive to garner. HUMINT Intel isn't practiced between staunch allies either, but maybe between uneasy allies and enemies.