Gang Signs

Within our contemporary society, there is also what I have often called a secret society. It has emerged from the world of gangs. These people, of various ages and intentions, have formed a system of communication that supposedly will keep most of us "in the dark" about their activities and ways of life. If you have a child, friend or other young person who is becoming, or has become involved with such activities, you would do well to make yourself aware of what is involved.

This one has several signs - apparently posted by various people & police depts.

We especially noted the bottom right one on this site.