But if you don't contact guest relations then the mgr will just figure it was the complaint of one guest that night if he/she even remembers. Guest relations should know that this made a guest feel uncomfortable and wasn't necessary.
Whether or not "Disney" reads these boards is really irrelevant because "Disney" is made up of thousands of people, this should be addressed through the right channels to guest relations to be resolved. The behavior of this CM was unprofessional, end of story. I would address it and onthe other hand, it certainly wouldn't hurt to mention how "happy" and pleased you were with your Gary, your server.
Just tell them you felt the need to address them about your recent experience at Spoodles. "While we had a wonderful server I thought I would mention that I did find the head chef, line leader, etc disturbing as he yelled unecessarily at a tone that was even too loud for this restaurant, etc, etc...""