Answer:
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
If you lose me you may cause people around you to lose me too.
I am a rock group that has 4 members, all of whom are dead, one of which was assassinated. What am I?
I'm written with two letters, said with one and seen with two. What am I?
What is black when you buy it red when you use it and gray when you throw it away?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.