I was recently confronted with a variation of this, "We are all entitled to our own opinions". I think it was an attempt by my brother to validate his opinion as an unassailable right, whilst reducing my fact based argument to that of a mere "opinion".

"But what if my opinion is that you are not entitled to an opinion and that I am justified in doing everything in my power to prevent you having or expressing it?"

If we are truly entitled to our opinions then, I should be allowed to deny him his opinion. If he tried to stand up for this belief we are all entitled to our opinions then he has to deny me the right to have and express my own, which would make him a hypochrite.

There are probably huge holes in my rather "playground level" logic but it did a rare and magical thing, it shut him the hell up for a few minutes :-D