Backdraft you can use a PO Box (I have a few and I have valid emails and phone numbers). But you can contact a post office and they will tell you who the PO Box belongs to. You can use a corporation or an LLC and I can go to the Secretary of States website for you state and look up the principal parties and likely find your name and then track your name right from there or look you up on whitepages and find where you live. And trust me people do go to these lengths. Sad part is people think this is perfectly normal. You get that happening and you get a little spooked.
I have a friend that has a FFL because he collected guns as a hobby. Thanks to the internet somebody listed all people that held FFLs is the US. Now this guy gets several people a week calling or knocking on his door to buy guns and he doesn't even sell guns to the general public. Wouldn't that make you feel real safe.