Here's
Genesis, a Mosaic Blue entry written on the first anniversary of the idea. In it, I basically tell the story of how this project got started, skimming over the reasons why.
The short version of the "why" is the TCFL founders became friends on a sub-forum of a large website, and were the most active forum on the entire domain. As such, we attracted lurkers and trolls from other parts of the website... and (as those people were mostly mommies) they supposedly complained a LOT about us. So the website's staff came down on us hard... but never offered any proof the complaints actually happened or showed us any respect whatsoever. If we couldn't make our little forum a happy, sunshiny, extremely parent-friendly place, we were no longer welcome. So we took our ball and went home... well, built a new home, whatever.
Basically, when faced with a situation in which we would lose each other, we did the only thing we could: We found a way to keep our friends and opened the door to make far more new friends than we otherwise could have. (The result is the most heavily trafficked CF forum on the web.) You're all here because a group of people became friends in a place they weren't really welcome, and scrambled to keep those friendships when their meeting place was threatened.