Greetings!
I have some good news for all of you!
The development team has been working on a text command based toggle head gear ON/OFF feature and we are planning to implement this in the June version update.
There were a lot of requests for a configuration based setting and we looked into this, but since this involved UI alteration we will only be adding the text command version.
By toggling your head gear display ON/OFF, the visual display will be reflected for both yourself and others who see your character. (There will be no visual changes for tunics and other similar gear that restrict you from equipping head armor.)