Anything you convey to a person in any way whatsoever is information.
Philosophy and information are founded on either facts or falsehood.
If you disagree with someone’s opinion, that does not make it misinformation.
What would happen if we stop sharing information with one another?

A useful opinion that is only in your mind cannot benefit anybody except you.
When we share our opinions with others, we convey information to them.
Having views would be purposeless if you do not communicate them to others.
So anybody who tells you to keep your opinions to yourself is a damn jackass.