It needs a gas mask with Mickey Mouse ears that is bleeding dollar bills onto a starving immigrant Bart Simpson.
Edit: That sounds flippant, I should explain. This SCP is neither insane enough or realistic enough to be good. Right now it just reads like a little bland wish fulfillment with a too mild twist of "it got people killed" at the end.
This thing should both misunderstand what it is doing and turn it up to 11. It needs to embarrass Banksy in its overreach, and then it needs to go on a purity quest where it turns the people it superficially supports against each other by constantly one-upping whatever position they hold with a bigger word stew including terms like "colonialism" "patriarchy" "cisgendernormativity" and such that make the average Tumblr bio seem tame by comparison.
When it is at a minimum wage rally it needs to demand something higher than what the protestors are asking for. If there's a marriage equality rally it demands polygamy. Its motivation should be to be more better and more authentic and more opporessed than anyone around it. And if anyone near it questions its message or advocates for restraint it needs to rally everyone around to destroy the white racist bigoted xtian from Texas.