Regarding finding/contacting people: All of a person's personal information is now available on the Internet - for a fee. Just search on a name and all sorts of links come up for the simple stuff, at a nominal cost per individual. But if you want somebody's Social Security number, retina scan, or DNA, you will have to go to the Dark Web and be willing to pay more (to criminal hackers).
So, now cell phones have some sort of "Do Not Disturb" feature that will let phone calls go to voice mail and accept text messages without making your phone "ring" or vibrate. If you did not put the caller's phone number in your contacts list, they cannot "disturb" you with their calls and texts. But, they can leave voice mail and text messages to review at your leisure.
That has worked for me for several years, now.
