FIGURE 1 - Manage Info Screen
Note that even though I have "Block Robots/Spiders from Indexing your journal" option checked off on my Manage Info screen, a Google blogsearch for "allah_sulu" posts still turns up a buttload of hits. According to the LJ FAQ: "Not all robots respect the rules, although most of the popular search sites' robots do." Be advised that Google is apparently not one of them. I realize this is no big deal for some people, but other people might want their journals kept out of the search engines for a reason, and by clicking this option they have clearly stated that preference.
I don't recall who said it, but I recently saw this