The Signal - 2007 - 6/10

Your parents, your grandparents, all tried to warn you. Too much TV is bad for you.
Sure enough, a weird electronic signal pulses through millions of screens.
Onlookers lose their grasp on reality and become murderous paranoiacs.
Those who anticipate gory violence will not be left hungry.
Splatter, dismemberment, carnage, all prefaced by anxiety delusions.
A dark film? Well, yes, but it is also fiendishly funny (reference headgear in image above).
One of the best horror comedies since Re-Animator (1985).