The Realtor Associations cannot dictate the listing price for agents, and that is essentially what they would be doing if they forced them to price as you state.
The opinion of a FAR (Florida Association of Realtors) attorney is that there could be some "false advertisement" issues if a Realtor or a seller, knowingly price the property less than an acceptable price. However, one would still need proof that they were doing it knowingly. There are some obvious examples, such as the person who listed the $5 million house in 4 mile village, for $10,001 short sale.
That is for the Courts to decide, not the Realtor Associations.
I will add that Realtors have a Code of Ethics to which they are held accountable, and to knowingly deceit the public will not be tolerated. Both the public and other Realtors are able to report Realtors for violations, so if you can prove that a Realtor is violating the Code of Ethics, report them.
What duties concerning accuracy of list price does the Realtor have when they write the listing agreement?