And yet, let's see here, from personal experience:
2000 - customs intercepts a package addressed to a fake name to one of my addresses. They intercept it only, no controlled delivery. Zero prior history. 7am they bust my door down, raid my house, find nothing.
2003 - they intercept a package addressed to a fake name in the other side of town. Again, no controlled delivery. Then they bust MY door down again because of previous association with that address. Again, they leave empty handed.
Both times, especially the second, they would make personal comments that would make me take pause.. Clearly someone, somewhere was keeping an eye on me for whatever reason.
Point is, they can do whatever the fuck they want, when they want, regardless of what the law says. They regularly do things that people say "but they can't do that!".
And then you're the one that is left to deal with it later if you so choose.
Point is that you should be the one to shut up because you have no fucking clue.