Earth's Vigilants

This is the symbol for a group called the Earth's Vigilants. I'd like to point out several things... one, the bottom spike isn't actually a spike, but rather a blade where the shuriken is meant to be held. Also, I didn't mess up on the lines there, even though it may look like it, that's to make it look as if it's thicker there so it's easier to hold and easier to flip into the air.

If you can figure out the meaning behind it, then congratulations.