Scab Trappers in Darktide have a similar goal to the Pox Hound - their aim is to stun a party member by shooting a net that will trap you. The trappers don't make much noise and will sneak around and hide, waiting for an opportune moment to strike, often running away to find a new hiding spot when they have fired their net. The trapper's net does very slow corrupting damage over time, but trapped players will often fall victim to other enemies if they are not freed quickly, as they are unable to move or defend themselves.
The net can be dodged - ideally wait for the first clicking sound as he begins to fire the net, and then dodge sideways.
Scab Trapper in Darktide
Scab Trapper Face
Scab Trapper Weapon
Scab Trapper Weapon - Darktide
Scab Trapper from the side
Scab Trapper from the back