What type of work do you do? I don't really have any nutjob coworkers at my current and volunteer job.
The only mildly weird coworker I have is from my volunteer job. One of those #FreeTheNipple types, who insists on posting topless photos on her IG and then complaining that she's being sexualized and/or repeatedly banned from IG. I randomly opened her IG story one day and the first thing that popped up was an uncensored topless selfie. I texted another coworker (good friend) about it, asking "what's the deal with (name), I'm guessing this is an accident?" but she responded that (name) was actually sitting right next to her at that moment.
(Name) took the opportunity to debate me on whether female breasts have been unfairly sexualized, questioning me on what went on in my mind and somewhere else when I looked at her photo, ...
But as far as coworkers go, that's about as weird as it gets in my workplaces.