Yeah, it isn't the ability that sucks, it's the player. Shadowbind I think is meant to be used in emergencies (so the RNG can run) or in solo situations. If someone is doing that repeatedly, politely ask them to stop. If they don't, contact a GM and ask them to give the person a warning, or move your camp.
Sorry to hear a RNG out there (there are so few) is being an ******* like that, but people will be people.