When you visit a web site, you trust that it will give you the data you ask, and hopefully <i>not</i> a lot more.  You hope that it doesn&#x27;t give you viruses.  Sites that do are not trusted.  Sites that don&#x27;t are... not untrusted. :(<p>You also hope that visiting a web site doesn&#x27;t lead to the web site running a scan on your IP address.  Or doing any number of other nefarious things.<p>This kind of trust is at least most peoples assumptions.  If it weren&#x27;t, there would be no outrage or even surprise at the nefarious behaviors which abuse our trust.