Esterhuysen used the word "fuck" repeatedly in a 01:00 broadcast.
EWN editor Katy Katopodis said he had been summarily dismissed.
Although she had been unable to reach Esterhuysen by phone, a letter of dismissal had been delivered to his house.
"We can't tolerate that kind of behaviour. I don't think it's appropriate to use our platform, which is credible, to promote your own agenda," she said.
A 41-second clip, purportedly of the broadcast, on the website twitvid.com had garnered 35 000 views by Tuesday afternoon.
In it a man who identifies himself as Mark Esterhuysen, says: "Fuck racism, fuck the pigs who killed Andries Tatane, fuck the AWB, fuck racism. We are all wild animals here, meant to live free.
"Fuck capitalism, fuck fascism. Fuck this fucking wage slavery shit. Fuck domestication, fuck Julius Malema, fuck the state. Fuck the petrol economic growth on a finite planet."
On his Twitter feed, he identified himself as an enemy of the state, a defender of anarchy, a proud member of the primate clan, a cunning linguist, and a master debater.
He had tweeted that all he wanted in life "is for @GarethCliff to read my blog".
His most recent blog was on the role of sport in modern South Africa, from an anarchist perspective.
Other topics dealt with the futility of civilisation.
24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.
Ian Gabriel's thriller Four Corners has achieved a double win at the Santa Fe Independent Film Festival, where it competed with films from the USA and around the world. Read More »
Cape Town might hog all the headlines and attract A-list Hollywood glitterati to swan around its scenic filming locations, but Joburg is quietly and emphatically staking its claim as SA’s true film capital. Read More »
Guns N' Roses guitarist!
New music video!
Great gig pics!
Watch it here!
See the line-up!
JohannesburgDAV Professional Placement GroupR240 000 Per Year
Johannesburg CBDDAV Professional Placement GroupR500 000 Per Year
Johannesburg CBDR P Promotions
HousesR 1 850 000
HousesR 995 000
TownhousesR 655 000