The Green Party is most likely to be associated by the British public as "idealistic" and "amateurish", according to the latest ITV News Index poll.
The survey of 2,013 British adults suggests just 9% associated the Greens with the phrase "a serious party of Government".
The ITV News Index poll was carried out by ComRes between 27 February and 1 March.
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The whereabouts of Ben Whyley and Ryan Hobday, who are wanted in connection with two linked killings, are unknown.
The activists had been sent to prison for their 100-hour demonstration at the Cuadrilla site in Little Plumpton, Lancashire.
Russian officials are looking into the possibility it was a terrorist attack.