I haven't heard of that in a long time. I used to do that when I had just gotten my computer and was enthralled with surfing the net. I found some interesting and also some very strange websites with it.
But then I heard it was spyware or something and stopped. Can you tell us all a little more about it?
Wait, I have heard no such thing about it being spyware... Maybe it makes browsers more susceptible or virus scans tag it as spyware? I could definitely ask my comp-god friend about it.
Actually, I was hoping to find ways to choose more specific categories for favorite categories, i.e. fishkeeping and anime. Unfortunately, I have found no such way with stumbling about randomly.