We had a poster identify as a billionaire here recently.
I said he wouldn't really be one until he'd lived as one
for a year or so. (I suspect he wasn't willing to commit.)
Haha! ^.^
I also think this is why trans issues are different than these other issues where people try to identify as other things. One of the most difficult things to talk about are people like Rachel Dolezal (ethnically white woman identifying as a Black woman). People want to know things like "why should we respect things like gender identities and not things like trans-racial identities)?
It's very complex, and I feel like I'd have to sit down and type for a while to approach something like a thoughtful answer. But I know at least what it would look like: with gender, there are these historical traits, expectations, and roles that are socially accepted to apply to and come from masculine or feminine people differently. That's already a whole tangled mess of a statement to have to unpack as it is.
But the same can't be said for "racial" traits (Blackness is a culture and history, hence the capitalization): it's not socially acceptable to treat someone completely different because their skin tone is black or because they are Black on a social niceties level (in how we greet, in whether we open the door for someone or not, in what we assume they're comfortable with or capable of, all these different social things). When it comes to
marginalized communities like Black communities, a person that hasn't lived that marginalization that tries to identify with it is appropriating it and essentially stealing thunder without ever having suffered for it through most of their lives.
This all sounds good, but it gets tricky: for instance, some of this stuff is the exact same reasoning TERFs use to argue against transwomen (that they haven't suffered the marginalization women experience through their entire lives, weren't raised as girls [because upbringing contributes to marginalization in some senses], and so on). But what I think TERFs aren't thinking of are the first points that I made about the kinds of interactions gender identities mean as opposed to an identity like Blackness.
So when people say things like "I identify as a billionaire," if they're not being snarky, they're also not quite doing something analogous to gender trans-identity. If people say something like "I identify as an Apache attack helicopter," they're just ******** that have no good-faith intentions.
Like I said, it would take considerable thought and nuance to really say something helpful on the subject. But I hope this little post clarified the waters even a little bit to anybody.