Every day active practising individuals of a religion pick and choose what parts of, for example, the bible that they choose to live their lives by. An example being Leviticus 19:19 that prohibits wearing wool and linen fabrics in one garment. Obviously this is impractical and does not fit in with modern day life. You cannot pick and choose what you follow by and it is not only insulting to modern day society but ridiculous to anyone who makes that claim as they themselves will most likely be not following the (for example) bible exactly and changing it to fit in with their life.