I would not call laufen a troll. I deal with real trolls all the time when I make true statements on patriot sites, and this guy is nothing like them. I understand his point: if a bill of sale is absolutely useless in a legal sense what purpose does it serve, and why do so many people bother filling one out?
This is a good point to have brought up, because I had assumed that a paper bill of sale, presumably having been signed by the buyer, could be used as proof that a gun had been transferred on a certain date to a certain named person. So what I want to know is, is he correct in saying that the bill is of absolutely no use in a legal sense? Hopefully those who know more about the law than I know can give us an answer.
Even if it is of no legal use, say some crime was committed with the gun after you sold it and the gun was found and traced back to you. At least you would be able to give the police information on the name of the one you sold the gun to. Even if the bill of sale is not considered proof that the sale took place it could still help clear you by letting the police know the name of the one the gun was sold to, which might lead them to catch the real perpetrator. This of course is assuming you copied the buyer's name off something like a driver's license.
Another benefit it might have is that I would think a person who can not legally buy a gun would be disinclined to buy one if he had to show the seller his ID and the seller was going to copy his name off of it and keep it as a record. I met an ATF snitch awhile back (friend of a friend kind of thing) and one of the things he did to make money was try to entrap law-abiding gun owners into committing some technical violation of gun law so he could turn them in. He got paid a bounty for each one he snared. To give you an idea what a lowlife he was he is now in prison for rape of an underage girl. Would a person like that maybe be dishonest when he has a chance to make some money? I would think so. Would a paper bill of sale deter his dishonesty? I don't know, but maybe.