It takes a high level of jerkiness for someone to think "there's a person who I think doesn't look like the gender they seem to be presenting as so I will deliberately screw with them by using the opposite gender pronouns and titles". And yes, those people exist. Then there's a large slab of people who misgender because they have genuinely (to them) identified us as the gender opposite to the one we are presenting as. This may be for any number of reasons - they may not have seen us properly and make deductive assumptions based on height, hair style, clothes, voice, whatever - and so the wrong pronoun comes out. They made a mistake, we all make mistakes. The only way they'll learn is if you politely correct them. If they do it again that's when you report them.