Some may use the ignore function for different reasons. I seldom use the ignore function myself, but if and when I do it is because the person to whom the ignore is directed at has nothing of value to add or for me to read. It would be someone who I have determined that I can never learn anything from and the only purpose of the poster would appear to be to cause anger, frustration, stress or humiliation.
It would not be solely that I might disagree with them. I disagree with many people, but find value in what they post because it causes me to question my position and even, in some instances, change it. This is not the case with someone who I would consider putting on ignore.
If someone is put on ignore after careful consideration rather than blind anger, then I do not consider that it would be an ignorant choice.
Obviously, you are not on ignore by me.