In those quotes from the Watchtower, they do seem a little bummed out that they're not allowed to kill apostates. I guess they just had to settle for being as mean as they could be within the law if the land. Kicking your 15-year-old daughter out of the house and into the streets would give you a pretty good chance of getting her killed or having her die young.
I guess I should mention that I can't think of anyone in congregation where I spent most of my time as a Jdub that would have approved of kicking a 15-year-old out of the house and into the streets, but I did meet Jdubs along the way that I think would have found it quite easy to do.