Save Beeliar Wetlands campaigner Kate Kelly recently promised widespread civil disobedience should the project get the go-ahead.
The group followed that up with a meeting in Bibra Lake on Tuesday evening where about 100 people workshopped ideas about how to stop the road being built.
Mr Albert, Transport Minister Dean Nalder and Melville Mayor Russell Aubrey all refused to comment on the threat.
‘The Roe Highway extension proposal is currently with the Appeals Convener. The convener is investigating the appeals and in due course a report will be sent to me for my consideration,’ Mr Albert said.
The report is expected next month.
Mr Nalder said that any environmental conditions put on the project would be met.