One thing that unifies these terms is that many of them lead you to downloadable files. Looking at any Web site means your computer will download something (the picture of Ms. Biel with this story, for instance), but larger files mean more room for malware.
Computer security people say the actual search is not what's risky; that plain-vanilla list of links you see if you Google something is pretty harmless. Clicking through to an actual site is where you court trouble.
What names are safe to search? Obviously, you do better if you're not looking for people in the headlines. But McAfee claims Barack Obama was only 34th on its new list, and Michele Obama was 39th.