The day he killed himself we had some comments on here along the lines of "good, another kkkracka down," "he should have shot up his workplace otherwise this is meaningless" and the like. These were shut down early, but they show the limits of memeing about topics like anti-imperialism: it's really easy to fall into ultra territory, where you get out of step with the more practice-based approaches of the people you're trying to support.
Memes are all about building on and one-upping each other. That can get pretty far afield from a principled approach that's trying to improve the real world.