Too many glaring plotholes

I don't go into movies looking for problems, I want to lose myself and enjoy the ride, but this was just too lazily thought-out. The plotholes were just too glaring from the jump, the very beginning scene. Like, okay, sound is bad; and that's why we're letting our kids run - RUN - around an empty grocery store. And hey, let's go visit the river, to talk about the point that the constant loud sound there is a great cover... and then go back to our quiet house in the woods, instead of living in a goddamn place near something loud like a river or waterfall. And hey, we have an elaborate lighting rig around the house to change colors to warn each other - but not speakers set up all over the place outside, set to easily be able to provide distraction noises to actually draw them away from the house, should they ever get close, much less come inside. Which would be easy as fuck to set up. And yeah, while we're at it, let's pretend like the very best sound-proofing we can do, is to put a mattress over a hole. Wow, what the fuck. I know broke-ass musicians who do a way better job sound-proofing a room than this family, whose lives I'm supposed to believe absolutely depend on this simple concept.

^^
And that's without even getting into anything I consider nitpicking, which I could make a laundry list of. That's just some of the basic, lazy shit that jumped off the screen at me as I was watching it.