Spyeye is a particularly nasty piece of malware that is designed to steal money from online bank accounts.
Submitted sites are then verified by other members before it appears on their blacklist.
Google Safe Browsing is a free service by google to help combat phishing and malware.
, even when all the results are listed as safe, do not assume automatically the site is safe to visit.
Also, look at the date of the last scan to determine how effective these results are.
The child safety rating is about age appropriateness of the site, things like sexual content, violence, or vulgar language.