I think you misunderstood the point of this conversation. The hints system is not, by itself, a bad thing. The problem is, people just click "Add this person to my tree" without bothering to check if it's the right person ... or if they ALREADY HAVE THAT PERSON IN THEIR TREE!
To be sure, Ancestry is not a police state, but some of the users on Ancestry sure could do with a class on how to be a detective -- if only to make sure that their own trees do not perpetuate the errors made by others.