On the plus side, it has never been easier to ascertain whether someone is a fucking lunatic or not. I mean, I think that there has always been a certain percentage of bat-shit crazy people lurking around in any society. You just didn't hear about it all the damned time. There used to be some social pressure to at least try to keep your various preclusions on the down-low, so it was harder to gauge just how crazy that new acquaintance or hire might be. People who were still compos mentis enough to know that they were skating on that razor thin edge of crazy knew enough to keep certain particulars of their private lives, private. But now that they are encouraged, even celebrated for just letting their freak flag fly, it's actually easier. If they haven't already posted the names and back-stories for all the voices in their head on social media for all to see, just give then a minute. Given even a minimal conversational opening or encouragement, they'll waste no time running down their whole list of inter-locking mental conditions and various physical ailments and an entire pharmacopeia of medications that they're currently on. Want to know if your new gf might just be a loon? Go to her place. Use the bathroom. Check the medicine cabinet.