I lived in Southern CA from about 1982-1998. I ran a Dr. Who club (FRED-Friends who Really Enjoy the Doctor), and a Star Trek club (USS Tradition — I was Capt’n Lisa) (when meetings combined, we were “Tread”). The Dark Shadows group never really got off the ground. I had a little weekend business selling buttons, t-shirts and Dr. Who scarves at SF conventions called Starship Enterprises. It never made money, but I got to deduct my convention expenses from my income tax for a while.
So, when episodes of the show sound like conversations I’ve had at meetings or conventions, it seems more likely that one of the writers was there than that it’s a coincidence.
Although there’s an even better explanation. The more I read about Asperger’s, the more I think Science Fiction fandom has been a Support Group for AS since before Dr. Asperger describe it in 1944. And for Geeks. https://en.wikipedia.org/wiki/Asperger_syndrome