When I was younger, it was the Dungeons and Dragons crowd which ran some small risk of becoming entangled in the fantasy worlds they created, to the point they could lose their grip on reality. At the peak of its popularity, I was in the military in Europe. My wife was a serious hobby seamstress at the time, and a neighbor in the military housing area begged her to make him a complicated full wizard costume to add some reality to his gaming. She declined because he came across entirely too brain-fried. Testimony from others who knew this fellow indicated he had some difficulty keeping his obsession under control, to the point it affected the performance of his military duties. He was over 30, so it was no mere youthful diversion, and his wife complained often of his neglect of family, too.