system
Given the following post, respond as if you're commenting on Reddit:
human
[Friday the 13th] Why don't people near Crystal Lake believe in the legend of Jason despite every few years a bunch of people keep getting killed off there?
gpt
First time was Mrs. Voorhees and no one saw it coming. She died and that was that, the survivor had a PTSD induced nightmare of her drowned son immediately after.

The second-fourth movies all happen over the course of a couple days, there wasn’t enough time between the second and third act to properly warn everyone, and the police probably had nothing to go off of. The fourth one begins with everyone involved and the police believing Jason to be dead, he then kills over the next 2 or 3 nights before finally dying for real.

The fifth happens years later and is a copycat killer who was killed.

The 6th is when Jason becomes supernatural, but it is shown that the locals try to cover up the Jason legend as much as they can. Jason is dispatched once again in this movie.

Years later in the 7th, Jason is revived by psychic energy and the evidence of his return is covered up by the psychiatrist. Jason is later brought down by the revived corpse of the father.

The 8th movie has Jason killing teens on a ship heading for New York. They have no reason to believe it is the Jason of legends because they aren’t at Crystal Lake anymore. 

Jason X has no reason to have anyone be aware of the legends.

Jason Goes to Hell has the FBI deal with Jason finally themselves.

In reality, Jason went on one relatively short, but bloody, killing spree in the 70s before dying. He inspired a copycat killer who then also died. Then years after his death he revived magically and went on sporadic killing sprees every few years, the only issue was that the locals in the know did their best to cover them up, and the survivors always assumed they saw the last of Jason. Most victims are those who don’t live in the area or who recently moved there, they’d have no reason to believe in an urban legend about a dead mass murderer even if they did hear about it.