Mark Zuckerberg -- Alleged Stalker Claims Facebook Honcho Tried to Have Him Killed

Mark Zuckerberg -- Alleged Stalker Claims Facebook Honcho Tried to Have Him Killed: Mark Zuckerberg's alleged stalker -- who had to leave the U.S. last year -- is now trying to turn the tables with a defamation lawsuit which claims Zuck tried to have him killed.As TMZ first reported, Zuckerberg obtained a restraining order against…