What I feel is horrifying, is that the poster felt that the level of respect she received should be on the condition that she dresses a certain way. Like someone else said, if she wore "slutty" clothes, would it be okay to respect her less?
What we need to revive are the phrases "Well-groomed", "well-shod" and "well-kept". To signify that you are dressed appropriately for what you are doing. Or at the very least, you are hygienic. I used to have long hair and beard. It was forever flaky and greasy. After numerous attempts to wear the look cleanly, I gave up and now I have very short beard/clean shaven and short hair.