I'm just glad you're not in charge of this kind of services because although that might seem like an obvious thing to you, the reality is that the people needing that information the most are the ones who are the least likely to have easy access to a personal device with Internet access.
In particular, children and women in dysfunctional, abusive relationships are not very often provided with a smartphone and a data plan by their abusers.
I agree that the shift shortcut is unlikely to be of much use, but it's just one available method in addition to the rest.