I read on Teh Intarwebz that using an embiggened font makes your argument more persuasive. Huh, I guess it's true...
Not necessarily.
I've seen this twice with my home PCs, just prior to switching over to Macs. My son, playing online Flash games, with no Administrator rights, managed to go to sites that were able to install rootkits merely by taking advantages of OS vulnerabilities (IMO, these were Flash->Windows vulnerabilities but it could as easily be insecurities with Adobe Reader or in IE itself).
Our PC support group at work sees this same thing a few times per week. Users with no admin rights to a Windows desktop or laptop manage to get a rootkit virus and have to have their machines reimaged to the base Windows OS deployment image.
Maybe that embiggened font thing doesn't work all the time...