Re: making short barrel shotgun
Don't worry about getting on a "list". I would bet we're ALL already on some kind of "list".
If you want a short barrel shotgun, go for it. Find a gun you like that's not too expensive. File the Form 1 and wait 6-8 months for BATFE to approve it and get the form and stamp back to you, and only THEN have the barrel cut.
Be aware you can't transport the gun across state lines without prior written BATF approval, and you can't give the gun to anyone else to have in their possession unles you're there with the gun.