[avereveard]

style="display: none;" aria-hidden="true" tabindex="1"

many scraper already know not to follow these, as it's how site used to "cheat" pagerank serving keyword soups

[m00dy]

Google will give your website a penalty for doing this.

[phplovesong]

You dont have to use this. You can have it visible bit hide it for humans with other easy tricks.

[cuu508]

Scrapers can work around those other easy tricks too.