Date of Death: 1966, not only dead, but replaced by an imposter.
Life After Death: You don't need the Internet to have a death hoax. Paul McCartney proved that back in the 60s. The rumor that he was dead and replaced by a body double was so pervasive that in 1969 Life magazine had to run the cover story "Paul is Still with Us."
In the 40 years since his alleged demise, much has happened, of course, including several legendary albums with the Beatles, a good run with the Wings, a solo career that spans decades and scores of gold records, two marriages, five children, and British knighthood.
By the way, John Lennon assassination - not a hoax.