Like the idiots who call James O'Brien:
Caller: I knew what I was voting for. I voted leave because of XYZ.
O'B: That's not true.
C: Yeah but, I want them to stop imposing XYZ on us.
O'B: They do not impose XYZ on you; it is not true.
C: Oh, well, we will have to agree to disagree.
O'B: No. You cannot disagree. It is correct.
C: ...But that's my opinion.
O'B: No, it isn't an opinion. You are wrong.
C: I will have to go and look it up, then.
O'B: It would have been better to do that before you voted.
C: Anyway, no one knows what is going to happen.
O'B: Yet you knew what you were voting for and your example of XYZ isn't true.