Why are some reasons why teenagers might join a gang in the 1960s?

to feel like they were following the trends

Teen's needs to "belong." A passage rite from teenager to adulthood. Desire to share interests, even if those interests are viewed negatively. To feel popular, "cool", or "in" - - even if the group is viewed as not popular. Needs to separate and differentiate from parents. Rebellion, revolt against adults. For a reaction from adults. Low self esteem.