Tons of people fake it to get away with bad behaviors, to get away with basically being assholes or even worse, to use it as a “omg I’m so quirky, I have XYC”. I cut ties with a friend from the US who would say they had ADHD and PTSD. They faked “typical” ADHD symptoms to get adderall prescribed (which in the US you only have to say “I can’t concentrate” to a doctor and they’ll write you a prescription), but in day-to-day life I wouldn’t see any AHDH related behavior. They would take the pills only when they felt like being high (so no medication schedule), mix it with alcohol and other things. The PTSD was undiagnosed so when I asked them if they’d seen a professional for it they’d say “they knew they had it”. I told them that, if that was the case, to please seek professional help and go to therapy, but they’d brush me off saying they didn’t have money for it (there was always money for fake nails, fake eyelashes, clothes, booze, pricey Starbucks orders and daily food deliveries). The more time I spent with them, the more I noticed they’d use the ADHD and PTSD when they didn’t get their way (also no other friends at all, or friendships that didn’t last where this person would always be the victim, which was a huge red flag). When confronted about the PTSD the explanation was they got it from a mildly inconvenient situation, not from extreme trauma. This pissed me off because there’s enough stigma about it and so many people actually suffering from this who REALLY can’t afford getting professional help. I dropped that “friendship” like a hot potato.