If they refuse to take the test, then that is self inflicted and they suffer the consequences.
Interesting comments about amateur radio in one GMRS Facebook group.
"SCREW HAM"
"If it's so typical why are you here then .Uou already know it all .Go back to your bacon channels ham man."
"He’s got his Tech license now he’s an expert"
But, then, I noticed this one particularly cogent comment about GMRS repeater linking not being allowed:
"this particular rule becomes more important in time, so calling it antiquated does not support your end goal. GMRS has always been for 'short distance, two way communications.' GMRS was actually expanded in 2017 to allow for data transfer. The problem with linking is that there are so few repeater pairs available that linking will inevitably cause interference the bigger linked systems grow and/or limit the ability for individuals to have their own local repeater, which is allowed by rule."
Also, with regard to GMRS groups collecting (extorting ?) "dues" in order to get access to a linked system, one linked system owner said:
"you paid for the club access to the repeaters. Nobody said anything about linking repeaters." Another user commented "the whole point of [the GMRS group] was linking." That was followed with "Ask for a refund you paid for a service that can't be done legally." Yet another user has pointed out that there were something like 4000 members of this GMRS group. At $25 each, that would be $100,000 that the group took in.