On a similar theme ... I was wondering whether there was some way of encouraging members to give their location (even just to country level, not city) along with 'number of posts' and 'date joined'. I find it tricky to know, sometimes, how much cultural background I need to explain to make myself clear - generally more for people in non-Western countries, for instance. Also whether the person I'm talking to is likely to be a native, or fluent non-native, speaker of English.
Country information would give everyone a fairly good indication (90% reliable, not 100% of course) of both of those, and therefore help avoid misunderstandings.