I think there are points on both sides.

I think you're right that the BBC is being irresponsible in putting "my mum was a 17-year-old free spirit" in the headline -- even though it's a quote, it does imply a level of BBC editorial agreement with the characterization. It makes her sound like she was just an innocent hippie or something.

On the other hand, this wasn't vandalism for vandalism's sake. It was political protest against a dictatorship. It's not like she was engaging in criminal acts for the fun of it or for personal gain, so the snippet you choose is similarly misleading without the context of why.