If you like to be evil to your Sims every now and then, or just want to get rid of them, then TechTV has something nice for you. They've listed a few methods on how you can kill an entire neighborhood. There's also a video attached with the article, which probably is the part they aired last week. Unfortunately I'm unable to view the video though, so you'll have to check yourself (it's in Windows Media format, both in 56kbps for dialup users and 165kbps for broadband). For the whole article, follow this link.