Honestly, my buddy Mark tried this last year and his sister blew up his landline at 2 AM thinking he was dead. Turns out she just wanted to gossip about her date, but he was sleeping like a baby in the other room. He said the quality of his deep sleep improved so much that he started remembering his dreams again. His family eventually adjusted to the idea that he's off-grid from 10 PM to 6 AM. In my experience, that trade-off for mental rest is worth the occasional missed non-emergency.