It is definitely to grab attention. The ones I've heard speak have said that it isn't about being liked or popular - they managed to get the words
Just Stop Oil into the heads of hundreds of millions of people in the past couple of weeks. Which isn't that stupid if you think about it.
Every honest person who has publicly said they agree with the cause but think the tactics misguided now has to deal with the fact that if they really agree with the cause they have to do something. There's a phenomenon called the
radical flank effect that is now getting a lot of attention.
There's also something extremely provocative about creating outrage in people regarding our collective heritage - the beautiful things left for our collective enrichment. Isn't the natural world an extraordinary masterpiece being irreparably damaged?