Hi dj-quiou and DavidR,
As infected websites are being turned into the main vector of malware infection, the malcreants "work" this on the Internet as sort of a "moving circus", so the webmaster of some site, and especially those that are not that security aware, can be taken by surprise and not even aware their site is no longer to be trusted; in these cases reputation linkscanners are only adding to the problem giving the Internaut a false feeling of security. The only extension helping here is installing No-Script into a Mozilla-type browser, but that again is a bit over the heads of the n00b user, because they often do not know how to handle this nor do not understand how this works. That is why these malcreants are so successful and with millions of old, not upgraded and fully patched browsers, their success is guaranteed!
polonus