Do it alphabetically, or do it by the date they reached that activity.
To me, alphabetically makes more sense. What if someone, at the end of the alphabet, joined in 2002, didn't post at all for five years, then came back tomorrow and posted until they got 100%. Why should they get #1, rather than the person/people who have been posting since they arrived?
Either way, as long as someone who called themself Zzzz, joined in 2002, posted nothing, comes back tomorrow, and posts until they get 100%, doesn't knock me off the top spot, then I'll be happy.
It's fine if slaynish does it - he's more or less posted since he joined.
The only reason i was banned recently was because of something I didn't really mean to do. Well, I didn't intend to break any rules or anything, just adding to a joke.. I really dont get banned often anyways.