Because you'll both get dirty and only the pig will enjoy it. That's the way I heard the anecdote that Ross relates on his weblog with regard to RSS. No question that the great RSS debate, like the ICANN debates, has its share of pigs. Knowing who are the pigs is half the battle, and that's not always clear when you enter a new community, especially an online community. Still, Blogware has made a decision to support RSS 0.91. Why that spec? Why not RSS 2.0?