As a precaution against it being "lost" in the Post Office, I've taken to taping the bubble wrap completely closed and include on BOTH sides my return address taped to the outside. Ask me why I started doing this....
I agree, most people don't do it. And most likely will never have a problem. If the ATF decide to hang you on a gun violation, well, this is just another 6 month jail term added to your sentence.
My understanding is that you do have to have your name, city and state engraved in an easy to find (not disassemble firearm) location with specific minimum font size and depth. After all, you are technically the "manufacturer" of the firearm.
My last e-file form 1 took 5 weeks, 2 days.
If you have never filed one, I suggest you read all the way through it and collect all the data needed to fill it out before launching into it. Found myself backing up (which logs you out) and making you start from square one all over.