Didn't you just say that your family is now in Canada although they don't meet the RO? So which is it, inside or outside?
If they are outside and don't meet the RO, they will not be stopped from entering but they could be reported for not meeting the RO if the immigration officer suspects that. If that happens, they would have to appeal for their PR. Processing the appeal would take 12-18 months. If they lose, they lose their PR but if your PR is in good standing, you can sponsor them again.
If somebody doesn't meet the RO and they make it to Canada without getting reported, it would be smart of them to stay in Canada until they meet the RO again. Each time they travel, they take a risk to get reported as they return. So ok, there is no real risk to their PR in your case because you can sponsor them again but it is a hassle, if they lose their PR, they would have to leave and it may take months for you to sponsor them back. This would disrupt your children's education as well as your family life.