Um did he not choose work for the company payroll? Did someone make him do it?
Of course not, but that is not the point. He decided that some things are more important than following a workplace ritual. He's ready to accept responsibility for violating a workplace norm.
It's called disobedience, and he is doing it in a civil and non-violent manner. That causes people like you to whine about it, and other people to think about why he is doing it.
Keep whining-- it extends the buzz.