Why no more comments are allowed

From now on, there will be no more comments allowed on this blog.

While I have allowed posts for relevant comments, it turns out that people are turning this into their ad spaces. Often for things not related to the subject matter at all. While I like comments, and welcome anyone who opposes me, and maybe insults me due to my posts, I am not here for someone to provide their ads on my blog, especially directions to their porno site (how they wanted to connect, I do not know). This blog is largely focused on cultural commentary, and if no one wants to make such relevant comments, then there is no need for a comment section here - they can advertize their porno sites on other blogs.