I have, yes. I think it has to do with the fact that I use my blog as my personal diary and as a place to collect my thoughts. Given the inherently emotional nature of arguments about my preferred subject of discussion (religion), many people can take my opinions on the subject very personally, and vice versa. This often leads to personal insults. Overall, I’d say it has to do with how personal my blog is and how publicly I can get into arguments with other people.