Pointless scene after the end credits
That shot doesn't really add anything. Nobody could hear the screaming?
Overall, a decent film ruined by lame jump scares, and a hammy performance by Peter Stormare (as the parole officer). The kids are fine in their roles, but the writing is ludicrous.
Hacking into a home's security system, and getting a complete blueprint of the house?
Pick up your iPhone and FILM what you're seeing!
For a neighborhood with homes close together, it would be impossible for surrounding inhabitants to not hear what is going on.
I am assuming that the kids recently graduated from high school? (Or, is it just summer break? If so, why does his "platonic" girlfriend need to study? Summer school?) Etc.