texting over GRMS and it is legal.

[TACAIR]

GMRS is a fee for license service ($35) and the license is good for 10 tears, covers the 'family'

The radio comms can be monitored by any kind of scanner or UHF/FM radio.

So, for low-probability-of-intercept (PoI) communications, you can use text messaging.  Perfectly legal.

Rhino has had this for  years, mostly for a GPS check/check back.

Now BTECh (Baofeng) offer a radio with native texting built in!
BTech GMRS Pro Review - Data Over GMRS, Bluetooth, GPS, & Compass! Full Review & Power Test (youtube.com)
BTech GMRS Pro Review - Data Over GMRS, Bluetooth, GPS, & Compass! Full Review & Power Test (youtube.com)

and

Operator Series: GMRS-PRO Send messages without phones | Offgrid Technology (youtube.com)
klunky, but it works.

Or if you have a working cell phone 
How To Send Digital Text Messages Over GMRS Or Ham Radio - Texting Digital Messages On GMRS Radios! (youtube.com)
skip ahead to 3:15, the guy making the presentation is IMO a pretentious, world class ahole.  But he does do demos on the screen.

[NT2C]

Could not agree more with your opinion of a certain Youtuber who isn't a Rubicon.