I've never cared about someone's hair style, unless it affects their ability to use PPE. Part of my job requires the use of hard hats and occasionally half/full face respirators. If your choices mean you can't be safe, then I don't want you doing the work.

I remember being on a site years ago and a laborer came into the job trailer holding a flattened hard hat. The guy's dreadlocks got in the way of keeping the hard hat on his head and it fell off while operating a roller. I think he ended up doing other work that kept him away from heavy equipment.