Horror fodder like Friend Request tends to be dismissed based on its timely nature, which is really too bad.  These digital age thrillers may borrow from other formulas (or other movies), but they certainly are not derivative.  In the case of Friend Request, it owes a debt of gratitude to fellow social media flick Unfriended, but it fuses its modern premise of cyberstalking with revered lore and finds a good balance between “old” and “new”…