Hair loss means different things to different people.
This is a time when being bald has never mattered less. Most men who have lost / are losing their hair head down to the barber's and get a Number One. It looks neat, and gives an impression of confidence because you are not trying to fool anyone - which singularly fails anyway.
But - for some men, the loss of their hair is devastating, and they suffer serious lack of esteem and confidence because of it. For some of them, the delusion of a comb-over works because they really hope that people think they have hair, even though they don't.
Such men fail to realise that they are actually drawing attention to their hair loss, and their inability to accept it, and further fail to realise that people really don't care.
My hair loss is a constant source of teasing for two of my sons-in-law who both have full heads of hair, and who tease me mercilessly to the delight of their wives, and indeed mine! That's fine, I am not sensitive about my hair loss, although neither am I thrilled about it either! I accept it, and I have a Number One every week. My other son-in-law is approachng forty, and wears his hair shoulder length, even though he has lost most of the hair on top - it's not a good look, but each to their own.
So I think 'baldism' is a matter of perception - if you hate being bald and are sensitive, then strangers can upset you, but if like me, you really don't care, then you are immune to insults.
So is 'baldism' a hate crime? For some people yes. Let's remember, the legislation regarding bullying in the workplace emphises the perception of the receiving party, not the issuing party, so to defend yourself by saying you 'didn't mean it' cuts no ice at all.
I think people should be nice to other peeople, and apply a little sensitivity to areas where people feel insecure.