Schoolkids IM by commenting on blogs

InformationWeek editor Mitch Wagner discovered two schoolgirls "passing notes" to each other by posting comments on his blog. Their school's firewall blocks IM and message-board systems, but not blogs with message-boards, so the crafty girls hijacked his comment-system and passed messages to-and-fro!

Mitch writes:
* I'm actually rather impressed by these two girls' ingenuity.
* On the other hand, it's wrong. Our blog is not your private messaging system. Go leave your notes somewhere else.
* I expect I'll be working for steph and chey in 25 years. Hopefully, they will have forgotten this exchange by then.
* Don't they teach spelling in schools nowadays?