Dumb premise, cheap horror (spoiler)
Spoiler Alert:
The motivation of the murderers is just lazy, it doesn't make much sense and it isn't even explained a lot. Basically the old people are just jelaous of the young sexually active people, but they don't elaborate.
It's one of the movies where you already know what's going to happen, and that the group is going to die one by one. Cheap horror, you don't need to think a lot and it's not scary.
The acting sucks and some of the deaths are lazy as well. For example, the pornographer "producer" could have survived that attack. Also, unrealistic because the screams of the first attacked people would have been enough to wake up the rest.
2/10