You assume you'll find a lawyer to handle your case... and that you'd win.
If it was that simple there would already be cases pending.
I'd have no problem finding an attorney.
It boils down to: they don't have right to do anything without my consent. And, buying an airline ticket does not grant consent for anything.
If I choose to go through the metal detector or the new X-ray machines, I've consented. But, I have the right to revoke my consent at any time -- I don't care what the government says.
If I revoke my consent, I also forfeit my ability to depart on my flight. But, it doesn't give them the right to detain me.
The only way I lose my right to consent or they have the right to detain me if I'm arrested. And if they do that, I'm not answering any questions or consenting to anything unless my lawyer is present.
The only exceptions to that rule is if there is an reason to suspect that I committed a crime. And my refusal to consent to a search is not a valid reason to suspect I've committed a crime. There are multiple Supreme Court precedents for this.
If it was that simple there would already be cases pending.
You didn't see the earlier posting from the woman who is doing exactly that?
This is a new policy. And that's why you are suddenly seeing an explosion of people that experience it.