Canada

It doesn’t matter what anyone tries to identify as … the problem starts when someone chooses to identify one way or another for monetary, social or professional gain. The problem start when the person appropriates an identity under false pretenses and then benefits from that identity and then chooses to live under that lie.

The biggest issue here is honesty

Another issue is that self-identifying in a certain way shouldn't come with monetary, social or professional benefits. Easier said than done, of course, but at least in some cases it already happens. For example, people aren't entitled to use a handicapped parking spot by merely self-identifying as having limited mobility; sports organizations have (still evolving) rules for trans athletes; etc.

Whatever we do there will always be people who try to take advantage of the system, and people who will unfortunately fall through the cracks. Part of the issue is also that many of these identities aren't binary: plenty of people have mixed heritage, or have partial disabilities. What do we do about that, and where do we draw the line? Can we have the nuance to cope with gray areas on a case by case basis? A broad consensus will be difficult to achieve in gray cases.