It used to be only gory horror flicks or willfully stupid, stoner-friendly comedies (think Grandma’s Boy), but studios now play shell games with even their downmarket genre fare, refusing to screen for critics movies that they think they can bypass traditional press and reach audiences with via direct-marketing napalm campaigns. The latest example of the trend? 20th Century Fox’s PG-13 paranormal horror flick Shutter, starring erstwhile Dawson’s Creek pin-up Joshua Jackson, which opens this Friday, March 21. It’s their product and totally their prerogative to follow this tack, naturally, but I always do feel there should be reportage on this fact, for the image it projects, rightly or wrongly.