The peace symbol (☮) was originally designed for the CND (Britain's Campaign for Nuclear Disarmament). Since it was never copyrighted or trademarked, it ended up being adopted by peace activists all around the world.
I thought we weren't allowed to get our hands on this! Of course, that was eight years ago. How times have changed! I'm definitely giving it a look! Maybe I'll recommend it to that Vinesauce guy or something, I dunno.