Yes - Maine did the right thing. There are too many security risks with free versions of these tools. Not enough copyright or privacy protections of data.
No, but.... - You must have good security and privacy policies in place for ChatGPT (and other GenAI apps). My organization has policies and meaningful ways to enforce those policies and procedures for staff.
No - Bans simply don't work. Even without policies, this action hurts innovation and sends the wrong message to staff and the world about our organization.
I'm not sure. This action by Maine makes me think. Let me get back to you in a few weeks (or months).