Sorry, not buying that one.
That's not how these guys protest. They tend to put themselves on/in the site they're protesting in. Typical of their tactics are things like the Newbury bypass protests, where they esconced themselves in the trees that were to be chopped down and forced the contractors to have them removed. The Anti-Fracking protests are another case in point. They storm the site, sometimes break stuff, but mostly put themselves in the way of what people want to do.
This doesn't fit the MO that they've built up over the decades.