Better yet, IGNORE them. Remember that these organizations only exist because they have viewers so WALK AWAY. Don't give them your attention. Don't give them your money. If you know of a company who advertises with them, don't buy their product and let them know WHY you're not buying their product. Vote with your dollars. They will take that a lot more seriously than they will take threats of violence.
Better yet, IGNORE them. Remember that these organizations only exist because they have viewers so WALK AWAY. Don't give them your attention. Don't give them your money. If you know of a company who advertises with them, don't buy their product and let them know WHY you're not buying their product. Vote with your dollars. They will take that a lot more seriously than they will take threats of violence.