Well, good for him, but I don't actually care and the bloody bar would not go away. In frustration, I actually followed the link and discovered that the majority of people commenting there were complaining about the advert, so I hope he gets the message. I added a comment too, so I hope that both the people who are using this as a way of "driving" users to their page and LJ get the message that this kind of thing is Not Welcome.
Thankfully,
I can confirm that this does work. :)
ETA: I think this may have caused such an outcry that LJ seem to have now removed the bar altogether. I can no longer see it in my settings. So if you missed it, consider yourself lucky, but at least it shows that LJ do listen sometimes.