It's odd. In real life I don't know anyone who institutes an NC policy with their family or their in-laws. Yet it seems rife on MN.
With some exceptions (and yes, I know a few people will respond on here with heartbreaking and entirely understandable reasons), there often seems to be not a lot behind it. The impression I get from some posters is that it's more about control and punishment.
Is it my real life that's odd, or MN? Is anyone else nonplussed by its ubiquity on here?