First: actor intentionally disrespected someone. Speaking in a movie theater, especially after being shushed. Using the letter "u" to mean "you" in formal business communication.
Second: actor unintentionally disrespected someone. Clipping your fingernails in class. Badly misspelling someone's name in a critical business communication.
Third: actor unintentionally makes an inconsequential error. Native English speakers misusing "it's" or "your" and their respective homophones, or missing antecedents ("As an expert, it's important to do X and Y" rather than "As an expert, I think it's important to do X and Y").
Fourth: actor intentionally makes an inconsequential error. Wearing obviously mismatched socks. Consistently writing in all lowercase.
The key, for me, is evaluating intent and impact. Group #1 is asshole: they mean to hurt or annoy. Group #2 is incompetent: they make mistakes that matter. Group #3 is hapless: they make mistakes that don't matter. Group #4 is quirky or aloof: they're not hurting anyone, and they're OK if people draw negative inferences about them, so hey, it's a free country.
You might reach different conclusions about the groups, or subdivide the groups further.
(Anticipating critiques of my examples: yes, I really do think that misspelling the English pronoun "you" is disrespectful. Misspell your own name if you want to move from Group #1 to Group #4, but please don't misspell the word that you're using to represent me. And clipping your nails in class is such over-the-top behavior that I believe it's more about upbringing than intentional disrespect.)