I think it's bizarre how people can go weeks without sleeping on this game, I think sleeping should be nssesary, and the later it gets the lower Strngth gets unless they click a "sleep" button or tool, or a bed.
now I know this sounds boring, but rather than wait from 10pm-5am doing nothing, the sleep button/tools will send you to "dreamland" and chance of "nightmare land" depending on alignment (good go to a castle like place, neutral to a dungeon searching for tresure, evil to a hellish place in the bloodwars. In these places you can continue to adventure, without getting board, and if you get killed in a dream, your character just wakes up. That way people wont always be awake like some horror movie where people well... never sleep!