To me, the problem with this particular issue, is not, that it's there, but HOW it got there.
AVG taking really bad example from other is forcing you to install Link Scanner, and some other bar (Yahoo?).
I say, forcing, because not everyone uses custom install, and before you know, both addons are there.
There is no simple way to get rid of it.
You can actually disable it, but then AVG displays yellow "!" mark on its systray icon.
The only way to get rid of it, is to reinstall AVG over the top, using specific command line, but again, how many people are aware of it?