It's as annoying to me as people who insist that bisexuals are just people on the fence, or that gay people can be cured.
OMG YOU MUST BE TEH GAY!!! YOU ARE IN OR OUT!!!!
OMG I CAN CURE YOU OF TEH GAY!!! JESUS LOVES YOU!!!
OMG YOU MUST LOVE TEH CHILDRENS!!!!!!111 PLEASE WITNESS MY MANY PIKTURES AND AMUSING STORIES INVOLVING POOP!!!!!
OMG BRREEEEEEEEDEEEEEEEERRRRR!!!! OMG YOUR CHILDREN'S PRESENCE BURNS MY EYYYYYES!!!!! I WAS NEVER A CHILD AND CHILDREN ARE OF SAAAAAAAAATAAAAAAAAAAAAAAAAAAAAAAN!
Pretty much the same kind of pointless posturing, when you get right down to it, and it changes about as much.