I believe people who make fake historical items or blatantly lie about the past should be put to death.
You shouldn't put historical liars to death. A civilized society doesn't commit murder.
But more to the point, much of history's lies are because there isn't enough information. It's true some people purposely try and deceive but I don't think someone claiming they've found the ruins of "Atlantis" should be put to death...In more serious matters though for those who are trying to openly deceive and change the course of events to suit themselves. If their lies are so believable how good is the source of information to begin with to prove their lies as just that...lies? If the source is clouded who's going to have the ability to make the correct choice? They'd be doing what the liar did; judging History for themselves and making the call without certainty.
If the truth were clear no one would even give them the time of day. I also don't think there's that many people actively trying to corrupt everyone by fudging the past. The past is something people don't really focus on; right or wrong they typically don't.
Most people fudge up the present and therefore the future. Like those who tried to change textbooks for future classrooms to include shit like the Creationists "intelligent design" hocus pocus.
If the death pentalty is going to be your standard for historical documents from X number of years ago. Shouldn't that also apply to those people doing the same things in the present? If the answer is yes as I suspect it might be. You essentially making it illegal to lie. In any form; hello thought police and hello 1984. Just imagine how it could affect things like Wikipedia and Encyclopaedia's themselves. A misprint could cost someone their life potentially; newspapers and reporters in general wouldn't do hard hitting journalism because they wouldn't get the chance to run a retraction if they fuck up and so on.
History is tough that's why you don't rely on one source.
Also if anyone is going to quote Twain it should be from "
On the Decay of the Art of Lying".
Mark Twain said:
"The lie, as a virtue, a principle, is eternal; the lie, as a recreation, a solace, a refuge in time of need, the fourth Grace, the tenth Muse, man's best and surest friend is immortal."