Minor parities will get together to discuss a campaign to preference against coalition and Greens MPs in marginal seats in retaliation for changing Senate voting rules.
Liberal Democrat Senator David Leyonhjelm said Glen Druery, the so-called "preference whisperer", had discussed this plan with him and would take it to the next meeting of the Minor Party Alliance, a grouping of more than 30 small and special interest parties, in a couple of weeks.
"Amongst the minor parties there is enough horsepower that we could take votes away from the coalition in these marginal seats and ensure they actually lose some seats," he told ABC radio.
That could include the seat of Melbourne held narrowly by Greens MP Adam Bandt.
"I think it is very likely that Mr Bandt would lose the seat. He's part of this dirty little deal. If there's a price to be paid, then he should be amongst those who pay it," he said.
Under legislation introduced to parliament on Monday, voters will be able to cast preferences up to the number of Senate vacancies being filled in their state or territory.
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Voters can now vote "above the line", placing "1" above the party of their choice.
Preference flows are decided by parties and in recent elections, preference deals between micro-parties has seen election of some Senators with minuscule primary votes.
That especially applies to Australian Motoring Enthusiast Party Senator Ricky Muir, elected in 2013 with just 17,122 first preference votes.
Although unlikely to be re-elected under the new rules, he says he'll still support government legislation where he believes it's justified.
"If I could and spend a whole heap more time with my family I would not object to it," he said, adding he was very concerned for Australia's democracy.
Deals like this would only cement certain parties into power where "absolute power corrupts absolutely".
"I want at the end of my term for other ordinary Australians to be able to stand up and defend their right to have a say in democracy rather than have it stamped out because of the interests of three or four parties who think the current system is undemocratic," he said.
