Good title, but doesn't quite suit the film...

I love the title and the film, which is full of suspensful moments.

However, I didn't think the title suited for 3 reasons:

1.) He wasn't a 'stranger' in the traditional movie sense. He became known to us almost instantly and to his victims, and wasn't some ambiguous psychopath.

2.) He wasn't really 'watching' - he kidnapped a set of victims and just kept them hostage.

3.) The title and it's premise overall implies that it would be a film about lurking and visual stalking - ie, commuters in the station unknowingly being watched by a stranger, who then selects victims who are never seen again. As it turned out, it was just a kidnap film with a twist of sorts to an earlier event.

I know it was based on a novel, so if it's a faithful adaptation, the same goes for the book.