In the four you mentioned, I think this number four is the one I use most frequently, but then, I don't actually use the ignore button, I just ignore by not replying to that user's comment or criticism, I have never, and will never use the ignore button on a user for criticizing me or my post in whatever way, no matter how wrong the user is with his or her criticism against me, i am of the believe that we all are free to air our opinions in the best way we understand the topic being discussed, and if at that particular time, that user's opinion is to criticize me, then

• I take it, and make the necessary adjustments ~ if I discover the user is right in his or her judgment of me or my post, and most times, I do this even without replying that user.
• I read, and ignore(without using the ignore button) , if after proper evaluation, I discover the user is arguing or criticizing me or my post out of point, sometimes I try to make the user understand by replying to him or her, but if still, the user won't, I just don't reply him or her anymore, I let it slide.