The issue of anonymous slander is obviously a big one, certainly not limited to our site alone. Having some aspect of identified group information may in fact limit that type of trolling, but that remains to be seen. Everything can be used irresponsibly. Your first point speaks to the question of anonymity's overall purpose. Wanting to be anonymous isn't always a sign of weakness- it's a reality for a lot of confident, intelligent people. Productivity, in our view, is hampered by the absence of contributions from people who have great ideas to share.