Yes and no. It really depends on the department and the nature of the crime.

Bad behavior is mostly reserved for departments and precincts with too much time on their hands and can make the jump from keeping the community generally safe and free of violence to enforcing the law because it's there to be enforced.

You don't have time to keep tabs on informants, organize unnecessary raids, call all your buddies to beat some black guy to a pulp and write tickets for tail lights when you've got actual calls to respond to.

edit: Thanks for the down-votes, care to share why you disagree?