What unmitigated horseshit.
Trans women look, act, and feel like women, whether they're 12 or 20 or 60. They do not interfere with anyone's privacy or security in a restroom.
They pose no threat to anyone in any restroom---and never have done.
President Obama responded to inquiries from school systems all over America, and provided guidance on how the federal government interprets the law as it regards the rights of trans people.
Nothing was arbitrarily dictated, and there are no new sexual norms.
Transsexualism is a gender issue, not a sex issue.
You are woefully ill-informed---and not a little bit bigoted.
A smart person would be ashamed to post what you posted.