Reacting to, disproving or otherwise going head-to-head with spammy “SEOs” who reach out to my clients is a nearly daily activity. And these spammers primarily feed on incorrect or outdated knowledge.
This poor advice is bad for the industry because it make legitimate SEOs look like snake oil salesmen. Jill Whalen did a great job of pointing out 7 Reasons Why Bad SEO Advice Spreads Like Wildfire.
Read these & recognize if/when it happens to you.
But I like bad advice.