I can see both sides of this debate, in theory. But there is one practical concern.

What if straight white males, in responce to those new policies, begin presenting themselves as gay, transgender, or related to minority groups?

The claim of being gay or transgendered can't be legally disproven. Nobody has to disclose their marital status or details of their sex life in the job application process. The definition of "visible" minority becomes increasingly vague at the times of interracial marriages, and especially marriages between people born in interracial marriages.

If a rule cannot be applied with any degree of consistency, then why bother establishing that rule?