Philip Gluyas has taken on American anti-autism bloggers in court.
Two "keyboard warriors" - one in Victoria and one in Los Angeles - were involved in heated online arguments over the existence of autism that quickly escalated into death threats, a court has heard.
Philip Gluyas, 49, an umpire in the Ballarat junior football league with Asperger's syndrome, claims to be living in fear after anti-autism blogger Oliver Canby urged people to kill him in a series of posts on the website 'Autism is Bad'.
Canby, who lives in Los Angeles, wanted people to show up at Mr Gluyas' Sebastopol home and murder him, the Supreme Court was told on Tuesday.
Canby, who does not believe Asperger's exists, claimed he would offer a $500 reward to anyone who carried out the murder.
Mr Gluyas, an outspoken advocate for the rights of people with autism, is suing Canby in the Victorian Supreme Court for defamation claiming he had made false and malicious statements about him, exposing him to hate, ridicule and contempt.
Mr Gluyas, who runs the blog 'Phil Gluyas: Autism News and Views. The truth about Autism is here', was first diagnosed with Asperger's in 1997. The condition is considered to be part of the autism spectrum.