"b a t c h" - why would Yahoo! block this word?

I feel incredibly stupid, but why on earth would yahoo block this word? I was answering a question which involved a reference to baking a "b a t ch" of something and yahoo blocked out the word. Why?

"b a t c h" - why would Yahoo! block this word?
Yahoo blocks *********, b i i t c h, b y t c h... and all other words that look alike. So nowadays I use beach





*Edit* Lol now it doesn't block the word. Amazing, they listen to feedback!
Reply:i have no idea prob because of the word b i a t c h they have maybe got a bit confused batch oh look at that i just managed to write it!!!!! can we write ***** tho?
Reply:because annoying bubble-headed valley girls pronounce "b- itch" as "b- atch"





kinda like the way this man-ish woman talks...





http://www.youtube.com/watch?v=wCF3ywukQ...








http://www.youtube.com/watch?v=fPDl2g8Up...