آپ should never tell someone that their OPINION is wrong... however, if they are stating that it's fact, یا آپ disagree with the base to their opinion then that's fine. In the end, everyone is entitles to their opinion, whether آپ think that it's wrong یا not! :)
Well with opinions, آپ can't really have a wrong answer. Just tell them that آپ disagree and say why. That's the most important part. آپ can't tell someone that their idea is bad without having a reason for why it is bad. That's why people should also read Tw*l*ght before bashing it. That way آپ can say all the horrible nasty reasons for the book and actually have proof! But I digress, don't tell people their opinion is wrong, because it is an opinion. There is no right answer.
posted پہلے زیادہ سے سال ایک
I have read it and still hate it... but of course... it's your opinion! :)
Only if you're not bichy about it. Everyone is entitled to his/her own opinion. Let them have their opinion, and آپ can have yours, and call a truce.
Oh, that doesn't count if their opinion could lead to them hurting themselves (like suicide, "I think I'm worthless") یا others (like Hitler and Mussolini).