People have the option to quit. The company is legally bound to obey, but individual employees can chose for themselves whether they want to be a party to it.

Yahoo may still be court ordered to implement it, just hopefully not with their best and brightest developers. I also have a theory that a lot of the recent terrible news coming out of Yahoo is due to staff complying with the letter of the legal order but not the entire thorough spirit of it, intentionally doing a quick, shoddy bug ridden job.