Who has the lowest post-per-day average? Mine is a shockingly shrimpy 0.06.
Well, you do only have 50 posts, but then again, mine is only .6.
Anywhoo, its not how many a day, its how good they were.
Mine is quite low. I think I was the 57th person to register on this message board. I just recently returned.
I didn’t realise there was a post per day tally until I read your post.
goes and checks out what mine is
Mine is currently 5.25 posts per day, so today my average probably isn’t as low as usual.
Actually, you were the 173rd. Welcome back! We missed you.
To answer the OP, there is probably someone out there who registered in the first couple of months, made one post and left.
Haj
At one point mine was around .02 per day. These days I’ve managed to boost it all the way to a whopping .27!
How do I check the number of posts? When I try to access the member list, I get a message that the Administrator has disabled it.
Does the Administrator hate me?
Total number of posts is below your name. To check the posts per day, clickety-click on the “profile” button underneath your post. You can see anyone’s stats that way, Mr. 0.12-posts-per-day.
Thanks, Zut!
BTW, it’s Mrs. 0.12-posts-per-day. 
Then there are the people who registered early but never posted:
http://boards.straightdope.com/sdmb/member.php?s=&action=getinfo&userid=4
Date Registered: 02-18-1999
Status: Member
Total Posts: 1 (0.00 posts per day)
Last Post: Never
0.08 Woo hoo!!! I thought it would be lower!! I ROCK!
.02 I am the lurker king!! Ok, maybe not the king but at least a member of the royal lurker family
Mine is…
0.18