I think it is a failure on the part of the search engine if it falls for that SEO trickery. I recall in the early 2000s it was popular to fill the bottom of a

I think it is a failure on the part of the search engine if it falls for that SEO trickery. I recall in the early 2000s it was popular to fill the bottom of a page with keywords in the same color as the background color, to trick the crawler into thinking the page was full of relevant content. After a little while that stopped working and would actually get your site penalized in ranking. The bad actors are never going to go away, they’re going to keep getting more clever and search engines like Google and Bing with billions in the corporate warchest ought to keep the edge in that arms race.