Why shouldn't they be allowed to? The hit to their reputation if they tried to pull a stunt like that would be far worse than the damage any law could do - the

Why shouldn't they be allowed to? The hit to their reputation if they tried to pull a stunt like that would be far worse than the damage any law could do - they would never be able to hire new people again. You seem to presume that the law is the only thing keeping corporations in line.