If you're sensible, you would immediately know that this sign is wrong. It has a very ugly connotation and best, never show it to anyone at all. If you're sensitive, you would have known there must be something more behind the sign. People point the middle finger because it's a form of emotional release that could ease the anger by that little bit. I haven't been angry enough to know how it helps, I'll probably never understand. I'm not sensitive enough to understand the feelings that might have caused such actions, I'm only sensible enough to know it's wrong. I don't know enough to know why it might be "right"? Am I making sense?

There's always something more. 

Don't judge at something you don't understand or has never felt. (Anyone, Anything)