XenForo's alert system kicks other forum engines' butts Muay Thai style which means HARD. XenForo is in a way reinventing forum interaction. For example, take quotes. If I wanna make sure the user gets my message I just quote him or her. Voilà! If I don't really care about his or her response, I just reply without quoting. All of a sudden, quotes became an invaluable tool for me. Let's see how long it's gonna be before vB and IPB adopt XenForo's alert system.