Which is to say, "Almost always". They can make whatever objections they want ("trolls!", "racists!", "climate-deniers!") but news sites and many of their read

Which is to say, "Almost always". They can make whatever objections they want ("trolls!", "racists!", "climate-deniers!") but news sites and many of their readers don't like comments because they don't want randoms destroying a 4000 word article with a quick "Here is why you are wrong."