>>1365691 Jean Claud Van Damme Time Cop paradox.
Some poor schmuck in the future will ant to get rich and be famous --
Can't think of anything
-- gets book from library, finds out who invented time travel
-- goes back in time and disintegrates that guy with future weapon..
--Stays in the past and says they invented time travel.
Repeat
It is like copying your friend's school work to infinity