One person I know online used to think I was borderline. I don't know if he still believes that. I don't even want to ask because he would just go on and on about it. He has never met me, and he doesn't know what I am really like in person. He is just kind of obsessed with borderlines so he sees it everywhere. He is a diagnosed schizophrenic, but I think he more likely has Asperger's, because it runs in his family. He went so far as to call a specialist in my area who treats borderlines to tell them about me and tried to convince me to go for treatment. Maybe I should return the favor, and find an autism specialist in his area he could visit. LOL
I looked up some things about BPD and watched a video about it to see what he was going on about. I didn't find anything I could relate to in it. The borderlines I saw in the video scared me. They seemed like the kind of people who bite your head off and get angry over nothing at all.
When I was a teenager people used to think I had some kind of eating disorder, because I was so thin and they didn't see me eat much. My weight was healthy, and my doctor said my eating habits were normal, just picky.
Other than that some people have generically called me "crazy" or some variation of it but not with any specific diagnostic label.
Usually I have the opposite problem, my difficulties are mostly invisible to other people so they don't believe there could be anything wrong with me. It has been that way since I was 7 seven years old and crying at school every day because I was convinced I had a brain tumor, or was having mild strokes or some type of palsy because I noticed my face drooping a little on one side. But anytime I asked for help in school the teachers would just say things like "you're so smart, you don't need any help" and that went on all the way up through college. People have said things like you are just being lazy/difficult/oversensitive/too picky/trying to make excuses/etc. If I tell people I have ADHD they act like they don't really believe it or take it seriously or they just don't believe ADHD is real anyway.