My model of humans says that some people will read their page, become impressed and join them. I don't know how much, but I think that the only thing that stops millions of people from joining them is that there already are thousands of crazy ideas out there competing with each other, so the crazy people remain divided.

Also, the website connects destroying civilization with many successful applause lights. (Actually, it seems to me like a coherent extrapolation of them; although that could be just my mindkilling speaking.) That should make it easier to get dedicated followers.

Destroying civilization is too big goal for them, but they could make some serious local damage.