Most micro-aggressions we experience pass without comment.
The phrasing of "micro-aggressions" seems to imply that these comments are less hurtful in some way. Conversely, I believe that micro-aggressions have the potential to be more harmful to the victim of said aggression because I feel that micro-aggressions are typically said subconsciously or without ill-intent, which implies that the person saying it doesn't realize that their words are harmful. Perhaps the person that said the micro-aggression doesn't agree that their words are offensive, which can be devastating.