Beanies could have many purposes, such as – dealing with chilly weathers, making a style statement, or just making a statement. Some of the beanies presented are really sarcastic in nature (e.g. Weed Police). It would be too much if we recommended to wear something that goes against the authority. But to make a statement, at your friends party, you can definitely sport something like this.
These beanies can be matched with leather jacket to get that rough look.