Its constantly changing and evolving, especially when it comes to spam. No webmaster likes spam on their website.
I can understand your point, but thats how this business works. Some people have no clue what they are doing. How else can we explain thousands of people are buying PBN links or domains on Fiverr. Many of them have no idea about the consequences, especially in IM you see how some people are doing extremely idiotic stuff without any idea what is going to happen. They already fail before they actually start.
You can be very sure YouTube is working on an anti-spam comment protection right now. As same as Google is improving their search engine in this moment to make blackhat SEO even harder. People which are registered on this forum or work in IM since many years know how much almost every website and algorithm changed over the past few years. Good message for you: There will always be new ways or other methods.