So what happens when they search your friends house who probably smokes and has something in his house. Then there is the friend he's going to tell and so on. Now I'm worried about getting busted and robbed. No thanks. Unless your po box is in a fake name(idk how hard this is to do) it's no different than your own mail box.
Not as bad as that, just be bit cautious. Here's what I've seen for the actual cases that happened.
With the doctor, he had shipments snagged by customs, but continued ordering more seeds. That was his 1st mistake. And from what I've read, there was no warrant. Local law shows up to his house, asks to search. He allowed them in. Not smart.
Another documented case I saw, was again no warrant. But the guy had a ton of grow supplies out in plain sight. That's enough cause to come inside without warrant.
Now having pounds of weed out in the open would be a bad idea for your delivery address. But if nothing is too obvious, you'll be fine. And these are very rare cases.
The way I ordered was I had a friend who was getting ready to move. Got about 5 years worth(i don't grow much at a time), and will be a while before seed ordering is done again.