I don't want to start an argument here, but just to keep things in perspective, about 14 million homes in the US are heating and cooking and drying laundry with propane appliances. As a matter of fact, when I was a lad, (Yes Dave, I was a lad once.) we had a big tank in the back yard that got filled twice a year.
Come to think of it, considering the amount of cigarettes consumed on a daily basis, it's a wonder any of us survived. Given the sheer number of potential ignition sources in our household, we certainly would have detected any leak instantly from the ball of flame rolling down the hall.
Obviously, there's a way to do this right where it poses an acceptably minimal risk.
Having said that, and with all due deference to Larry, I wouldn't store a tank in my home either.