Slippery slopes, you say? They don't exist!
A year or so ago, I told a defender of legal abortion that his arguments, if accepted, imply the young babies could be killed by their parents for the exact same reason he argued fetuses could. "Outrageous!" I was told. "A smear tactic! No one would ever advocate that!"
But, of course, he, being a decent human being, just didn't want to go there: his arguments certainly did imply that newborns can be killed, and the "researchers" who wrote the paper discussed in the link above at least have the honesty to admit that.
But here is the really "humorous" bit from the article:
"The journal’s editor, Prof Julian Savulescu, director of the Oxford Uehiro Centre for Practical Ethics, said the article's authors had received death threats since publishing the article. He said those who made abusive and threatening posts about the study were 'fanatics opposed to the very values of a liberal society.'"
Look, I am not in favor of threatening the authors of this revolting paper with death. But it is really something to see an advocate of infanticide call others "fanatics"!