Thanks again. Yes, the "thug" was involved in making one other sim of the same family "evil". Ideally, I would like the members of my rotation caste to be immune from trait changes, but keep the personalities. It's fun to see the game use "my" sims as kingpin henchmen, Helsing members, casanovas, harpies and so on. Some issues are caused by my "epic" lifespan. SP tends to completely atomize all families and basically turn the whole town into single occupant households that hate each other, because it has too much time.
I made another "semi-protected" caste to keep at least some families around.