“She just doesn’t get, yet, that the internet has two kinds of free and that the more something shouts it is free the less likely it is. How do you explain that firefox is free and safe but cursormania is free and not safe?”

I think I would try that  by explaining the difference between free as in freedom [gnu.org] and free as in “we will sell your soul to our advertisers” [google.com].

McDutchie, Malware Threat To Gnome and Kde en Slashdot.