If the UCI and race organizers can’t prevent Froome from racing maybe the peloton should police itself by allowing him to race as if nothing happened - or simply allow him to pedal along but not race for stage wins or the GC.
They know better then anyone if he is clean or not.
And how would they not let him race for stage wins or GC?
Other than outright sabotage, it’s hard to see how they’d do this. (And no team will risk their own race to do this)