Heather Mills, the former model and former wife of Paul McCartney, recently urged people to drink milk from rats and dogs to help save the planet. Mills started off by storming out of a radio interview in London, then drove a gas-guzzling Mercedes 4x4 to Hyde Park to speak about ecological matters—and kept the engine running for part of the morning.

Once there she proceeded to launch into an extraordinary ecological rant and exhorted the assembled crowds to try drinking rats’ milk instead of cows’ milk in a bid to save the planet from deforestation for livestock, which she said create far more carbon emissions than combustion engines.

Yet some observers couldn’t help wondering if Mills had a different aim in mind, as the billboard posters she unveiled were initially covered over by ads for the National Domestic Violence Helpline featuring a woman with a black eye. (Mills has previously claimed that she was assaulted by McCartney during their marriage.)