anyone can use the aarf tag and associate it with a bookmark. This potentially lets us get information from a larger audience. Which may turn out to be a bigger spam issue more than anything else. The only information that can be gleaned from this is what
H. Tan, and P. Lambrix. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 491--504. Berlin, Heidelberg, Springer Verlag, (November 2007)