Prematurely closing blogs. I'm sorry, but it is (i) singularly unintelligent to close a blog just hours after it was opened (ii) unfair to people who may wish to reply to a challenge duroing the discussion but who have yet to check back (iii) counter-productive, making people wonder what is the use of logging into the JC to blog about and debate issues of relevance.
Give each blog two full days of life at least!