WoT anomalies?

No doubt the WoT (Web of Trust) is a useful(?) browser plug-in, giving ratings and warnings for various websites but, it certainly proves perplexing at times. I receive a daily e-mail from The Guardian and, I'm always surprised to find that all the links are accompanied by a red circle (of danger). When I click the link to read an article of interest, I'm invariably greeted by a WoT warning page, "This is a bad site .... are you sure you want to continue" (or words to that effect). On reaching the page the browser is always marked with a green circle (safe, trustworthy etc.) I've tried to give my rating to the Guardian pages, via their warning page, to be greeted with a message "oops, something seems to have gone wrong". I'm puzzled; how does a 'dangerous' site suddenly become a 'safe' one by the simple expedient of visiting it?

This example makes me wonder about the safety of the sites that they declare to be safe; is it worth using this application at all?

Another little anomaly I've found, this time with IE8, my surfing being done using either / both Firefox and IE, is that when I close IE8 it's not unusual to be greeted with the message that IE has stopped working and they'll try to find a solution to the problem. Surely, in these instances, the real problem would be if it didn't shut down!