The Chumps appear everywhere on the map so they're easy to spot.
Chumps can spawn mostly in the urban areas of Miami, but in nighttime, they are scarce. They don't fight back and tend to flee and trip when attacked, see a person get run over or if they hear gunshots. Chumps can also put their hands up or crouch down. When voices is enabled on Options, Chumps can shout phrases such as: "Leave me alone!" or "Move!"