Last year, there were many posts regarding negative SEO. People being scared, others curious, many expressing skepticism, some preaching doom and destruction. But this as if faded away somehow. Is Google actually doing good job of protecting websites against people who "SEO optimize" against them? In some competitive niches like the Forex money and brand keywords, I know for a fact (boy was that an awful client to work with) that doing SEO for other properties, in order to dominate the entire first and sometimes, top posts of second page, in order to increase overall CTR and conversion rate is a standard practice. Even they however refrained from negative SEO techniques, dubbing them not bulletproof enough to invest in.
So my question is - What are your thoughts about Negative SEO in 2016? Have you seen it in action? Is it actually "dead" or just roams the shady corners of Google search? Have you experimented with it (I know I have, but the results were questionable)?