She's constantly doing political activism in the name of ensuring environmental policies and getting into a lot of trouble with the law because of it.
She's not throwing tomato soup at Da Vinci, mind you, but she was present during the environmental protest occupation when Germany decided to start mining brown coal again. You'll know it; it's the same protest with the mud wizard meme.
For all the disgruntled people saying she's a family funded shill she seems rather dedicated to her cause. A shill would've stopped ages ago when they're no longer front page news.