The paper has not been peer reviewed/published in a peer review journal.
The paper does not suggest we live in a simulation, it suggests a method for determining if we live in a simulation (big difference).
It is not a theory.
some more fun stories from that site:
Quote
Mayan calendar, Sandy Hook, Peace Prize Obama: Your entire reality has been scripted by the manipulation masters
AIDS fraud: The Marketing of an Epidemic exposed in House of Numbers exclusive film clip
Sandy Hook police audio confirms multiple shooters on the scene
Jumping rope and 9/11 truth - how the sheeple have been trained to avoid unpopular truth about WTC 7
Yes, fluoride makes you stupid
Global warming scam perpetuated by government, industry, and Wall Street - and taxpayers have been footing the bill!
Chemtrails used for corporate profits, weapons and depopulation agendas
The hidden (sick) agenda behind chemtrails
Chemtrails are real and they are damaging our health
The Big Bang Theory may have been disproved
AIDS: The great medical con, explained by David Icke