Opposition Leader Mike Nahan has said he has been "black banned" by The West Australian and its reporters will not attend Liberal press conferences or include comments from shadow ministers in its stories.

Dr Nahan said his office had been told by the newspaper it would not be providing the Opposition with any "vehicles for us to communicate" after he said in a Liberal party conference speech on Sunday that voters in the Darling Range byelection were not listening to traditional media.

But he denied the speech was meant as a criticism of the state's only daily newspaper.

"It wasn't an attack on The West Australian, it was me telling my Liberal colleagues that in the future, if we're going to duplicate Darling Range, we're going to have to go more grassroots, social media and door knocking," he said.

Dr Nahan said the Liberal campaign in Darling Range had assumed the circumstances of former MP Barry Urban's resignation would be a major issue for voters, but it soon became clear many hadn't heard of Mr Urban or were even aware of the byelection.

On Monday, The West Australian responded with a scathing front page and editorial commentary depicting Dr Nahan as dismissing the people who read its reporting.

Tuesday's front page carried the headline: "Dead man walking."

But Dr Nahan said it was beyond him why the paper attacked him personally and had chosen to boycott the Liberal party.

"They're basically telling us they're only going to government press conferences, they're only going to respond to government press releases," he said.

"They've said 'The West Australian has decided to only cover one side of politics', that's what they've told us. So far it's a threat, let's see how it works out for them.

"We're just going to keep on with our task, which is to keep the government accountable."

Editor of The West Australian Brett McCarthy dismissed Dr Nahan's comments.

"I am completely baffled as to why he is concerned or would care whether we cover anything he does or doesn't do," he said.

"Because he was very clear yesterday what he thought of not just The West, but all mainstream, traditional media."

Mr McCarthy said the newspaper would print what it believed was important to readers.

"Whether that includes what he says or not, we'll make decisions on a daily basis on that", he said.

"I suggest he should contact the editor of Facebook or Twitter, if such a person exists."