Anyone care to share any particularly poor SEO practices they've spotted?

Here's one I spotted from a client who outsourced their SEO to an Irish agency. The agency in turn outsourced the SEO abroad. The result was that someone (accidentally I presume) requested via the Google Search Console that the entire site be removed from Google's search results... on Christmas Day.

Google reviews your links to your website and crawls or index it separately. if any issues about these types of links Google penalizes or remove from it by Google Guidelines. So Good SEO Strategy works on the selected top website that always active and highly indexable in short duration.
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