QUOTE(Richard1990 @ Mar 8 2013, 10:43 AM)
Hidden links are links that are intended to be crawled by Googlebot, but are unreadable to humans because:
- The link consists of hidden text
- CSS has been used to make tiny hyperlinks
- The link is hidden in a small character for example, a hyphen in the middle of a paragraph.
Hiding links is perceived as untrustworthy and can cause your website to be removed from Google’s index.
This is not a ethical technique to put in use. i do agree with you Richard. These links are used to be seen by Search Engine Spider (Google Bot) having white text or background.
One should not put this technique in use as it is improper technique.