The roaches in Sims 2 were not fun. You had the option to stomp them yourself, which sounded like a good idea because it saved you the expense of the exterminator, right? Wrong. Your sim would get sick, usually for at least two days. Their needs would drop at random and they were always miserable. It was very contagious to other sims. I had a very, very large family once, and the kids would often run outside to stomp roaches and then pass the sickness on to their brothers and sisters. Hardly anyone was well for very long. It was one of those things that you figure out once, you call the exterminator no matter what, and then you never have to learn again, you just remember.