vnn.bz é seguro?

This website is not dangerous at all. It only contains links to get mostly copyrighted material for free. This is bad only for big companies and such, not for the users. Since it's free, you should never give any credit card info in this type of website. If you cannot tell the difference between this kind of place and amazon or whatever, then internet as a whole should be considered "dangerous" for people like you. You should never use WOT alone. For example you can use Netcraft Toolbar, which is an addon for Firefox. It gives you a visual indication if the place you're visiting is considered a phishing site. Right now I am looking at the toolbar, and while the WOT icon is red, the netcraft toolbar is completely green...