Are these url checkers reliable -websitesaftycheck - & isthewebsafe dot com ?

Hi forum friends,

I use a lot of resources to scan URLs for security issues,
Sucuri Site Check: http://sitecheck.sucuri.net/
Dasient Site check: http://wam.dasient.com/wam/diagnose?URL= etc.
VT URL scan: http://www.virustotal.com/#url-submission
URLVoid: http://www.urlvoid.com/
http://www.unmaskparasites.com/
soswebscan.jobandproject.com/beta_scan.php
http://com.saferpage.de/
http://siteinspector.comodo.com/public
etc. etc.

Now I stumbled upon these two scan sites, and I do not know what the scanners do and if the scan results are reliable?

Who is there to comment on the following two scanners:

  1. -http://www.websitesafetycheck.com/about.php
  2. http://www.isthewebsafe.com/Safety/

polonus

The website wXw.websitesafetycheck.com/script.js is flagged by Sucuri as “Site infected with malware” Malware found in the URL:
-http://www.websitesafetycheck.com/script.js/404testpage4525d2fdc

Site error detected. See: http://sucuri.net/malware/php-error-error-establishing-a-database-connection So we have to stay away from this scanner,
polonus