I've noticed the same thing but haven't been able to come up with a solution that isn't just saying "stop being such absolute jackasses when it comes to communication, schools" (and then having them actually do that) or yet another communication channel that may or may not take off enough to make me some money but, however well-functioning and well-intended, won't actually solve the problem, instead adding to it by creating one more way for schools to disjointedly spam parents.