Clearly no one is actually enforcing that. It seems HAM people with licenses are the only ones who seem to care if unlicensed people are using them. With all the Baofengs in use out in the middle of nowhere I've run into MANY MANY people who are running without a license.
Not me though, those things have way too many buttons. I'm totally satisfied to talk to my convoys on CB.
no-one in my groups uses CB, or HAM for comms as GMRS/FRS is far more common and available. GMRS can transmit on an FRS available frequency at lower wattages... so my groups have gone to fully GMRS within the group... its a one time fee of $30(I beleive this is in effect now), or $70 (what I paid 2 years ago) to cover me for 10 years.
CB can be used, and some use it to listen out for logging trucks.. but even the logging trucks have gone away from CB, and tend to use MURS frequencies..
HAM is a bit pricey for most, as well as getting the classes, testing, and licensing are a bit more than some want to chew...
GMRS is a clear winner as far as power, range, clarity, affordability, and gear availability.
I have my GMRS license, and a new MXT500 w/ a 6dB whip... have to do some testing, but believe it will get me near the 10+miles I'd like to have (vehicle to vehicle, no repeaters where we go..). the MXT275 I had got me to around 7miles with obstructions/hills.