I didn't say pixelate it... Like if you were taking a stance against racism you could make your avatar black and white. If you are in support of marijuana policy reform you could tint it green. For a stance on world peace you could put a transparent peace sign in the background. BE CREATIVE!
Don't ever try to organize a protest or a grassroots movement, it's not your calling. I have no idea, what is your avatar for starters?