As I heard from
ladybug218 here, there's a huge amount of fanwank going on right now that's kind of scary. The long and short of the matter is that if you have a fanfiction.net profile, it's going to be archived at
Fan History Wiki. Then anybody can edit information about you as they see fit, so if--in any way-- your ff.net profile can be connected to your LJ, there you go. Anything you've posted at your about your personal life can be added to the Fan History Wiki profile.
Just a heads-up, in case you haven't heard. I've taken down everything that connects my ff.net profile to anything else, but since I've already got a page on Fan History Wiki, that was probably mostly wasted effort on my part.
Here's a list, mainly for my reference, of pertinent links:
fanthropology, the people who run the Fan History Wiki
ladybug218's
listdejana has a good response
here, which shows how scary this can get
storydivagirl's
response "How to maintain fandom privacy" on
fanthropologythe person who runs
fanthropology getting
called out in the past