He said he broke up with his last girlfriend because she was beginning to 'crowd' him. [=she was not allowing him enough privacy and independence]
Her parents are concerned that she's been hanging out with 'a bad crowd'. [=with people who do illegal or immoral things]
He was never one to 'follow the crowd', so we weren't surprised when he dropped out of college to start his own business.
(..) No, thank you. You made the right call. Cheerleaders are a very subversive group. You don't wanna mix with that crowd. No, thanks. I used to be one of them. Oh, so you know. I do. Um, were you? You weren't a (..)2009 TvShow: Heroes Title: Chapter One 'Orientation/Jump, Push, Fall' Season: 4 Episode 1