“Instakiller” (** out of four) was a mediocre thriller melodrama about a woman (Kelly Sullivan) whose teenage daughter (Lizze Broadway) becomes world-famous on the internet through her photography website but this attention brings the attention of a stalker who attempts to harm all of them. Reasonably well-directed and well-made but offers no surprises and thus no sparks. Just because it’s a movie about the internet doesn’t mean it has to feel like it was spit out of a computer.