That is an interesting question and I am inclined to answer it, but I don't want to assume the meaning behind it. Could you narrow it down a little to make sure I don't misinterpret it?
> When you see something that does not seem belong where it is, you cannot pretend that did not see it.
1) How do you decide if something “belongs where it is”?
2) If a large proportion of a society agreed on a decision function and behaved as you suggest, is there a straightforward way an adversary could take advantage of this situation?
3) Bonus: Is there evidence this is happening today?
>> 1) How do you decide if something “belongs where it is”?
Experience and training. I just went through somewhat extensive system testing. Without going into specifics, there were several instances of 'expected behavior' vs 'actual behavior'. But this example may be a little too esoteric.
Lets say I walk around my house and see a book nested in a tree growing next to the fence. Does the book belong there? I would venture it does not. Reasonable person standard probably could apply here.
>> 2) If a large proportion of a society agreed on a decision function and behaved as you suggest, is there a straightforward way an adversary could take advantage of this situation?
Yes. And, in a sense, it is already being exploited in most visible way via social media. But I disagree with the phrasing of your question, because I think US society already behaves this way, which is precisely why it is being exploited.
>> 3) Bonus: Is there evidence this is happening today?
