Good premise, grotesque execution

Rating: 2/10 (5 November 2019)

Exciting concept, with great potential for a movie. The actors are fine, as well as the cinematography. However, the writing absolutely BUTCHERED this film. The characters engage in a string of ridiculous choices that make no sense.
1) The father sells security systems and is loaded because of it, yet he chooses to re-enforce his home with a few flimsy sheets of metal? 2) He does not decide to build a safe room? 3) The family spreads out as far as possible within the house so they cannot communicate? 4) The parent leave the control room unsupervised??? 5) The children know all the codes to disarm the security system? 6) The father insists on taping the intruder to chair while the intruder is already unconscious and while under extreme time pressure? Throw the dude out asap! 7) The son appears to have brain damage throughout the entire movie since everything he does is so stupid I can't even describe it? 8) Characters that are hiding in the dark attempt to signal their location with flashlights? Turn that off! I could go like this for a while...
It also seems to be a waste that the movie is limited to a home, since it has now become a home invasion movie on steroids. However, I find this only a minor complaint in comparison with the crap writing.
On the concept of a purge itself: I love the premise for a movie and do not expect it to give a realistic representation of what would happen during an actual purge. That is, I want to see a lot of violence, etc. However, I cannot keep myself from hypothesizing whether this would be realistic, so here goes:
What if crime became legal for a night? First, let's determine that: 1) most violent crimes are committed out of passion or due to personal gain (i.e. gang violence, domestic violence, violence during robberies, etc.). These types of violence are mostly circumstantial and cannot be postponed till the purge, since they are committed in response to something. 2) If crime, and murder in particular, is premeditated by someone like in this movie, there is something mentally wrong with this person, and they would not be held back by laws anyways, thus rendering the purge useless even to these individuals. 3) Social standards are still in place during the purge. If your neighbor goes on a killing/raping spree, he/she would still be judged the same as when he/she would do it during a regular day, even though it would be legal. Overall, it seems both unlikely that violent crime would be significantly reduced during the regular year, or that violent crime would occur on a scale as seen in this movie (Unless 10% of the population is secretly a serial killer being held back by the law).
Rather, a HUGE spike in non-violent crime seems probable. Everyone will try to make personal gains through or engage in robberies, cyber crime, stock manipulation, insider trading, forgery theft, etc.
Also, most who would have the financial means would flee the country. Insurance (home, business, and health) rates would go up by huge margin, and additional purge coverage would possibly be required. The U.S. financial market would collapse as all bankers try to steal their clients' assets. The weapon and security industry would increase rapidly in size.
Nevertheless, a purge with a lot of violence is a fun concept for a horror movie, although I would recommend skipping this one.