The person in your first example likely has autism. Your average person, no matter how much of an introvert, would never need to be coaxed out of the bathroom with the right combination of texts and vibrations. Normal speech works just fine on even the most introverted people. Introverts of that nature aren't afraid of people talking to them nicely or trying to calm them down, they're afraid of interaction. Being talked to with no expectation of a response is not interaction.

Why does everyone keep saying that every single new technology is going to kill face to face communication? Have you ever had a face to face conversation? That's not going anywhere. SMS didn't do it, MSN/AOL didn't do it, iMessage didn't do it, Facebook didn't do it. Hell we're even going in the opposite direction: Tinder exists solely to facilitate face to face (more or less) interactions.

Communication technologies do not make people unable to have normal conversations. It's just not happening. AIM was released 18 years ago, Usenet existed long before that, and written notes were quite common for hundreds of years.

Vaccines don't give you autism and neither does written communication.