This is a symbol you don't want to mess around with, which is why I loved it when I was a teenager. Also, it's used extensively in about half the video games I have played in my life.

 Biohazard is also a band that I, as an aging punk nerd, have mixed feelings about. They have been around a long time, but I don't think fusing punk with metal and hip hop is a sum that exceeds the value of the individual parts, if you know what I mean.

Here is an interesting article on the history of the development of the biohazard symbol. Today it is one of the most recognizable symbols out there.