That's on an international package you have to sign for and good advice.
There's no law against taking a package that is not yours out of the mailbox and that is what we're dealing with here.
Yeah for sure don't sign if the postman comes with a domestic package.
As I stated earlier when someone receives their package, don't open it and write return to sender, leave it on the table and wait a few days.
If LEO shows up there literally nothing they can do, at least for that package. Now if they have a search warrant and there's gear in the house, then you're fucked and they have probably been watching you for awhile.
Thats highly unlikely if you're just ordering $300 dollars worth of gear on your end.