The mistake is not what they are using, the mistake is every person <i>today</i> falling into that trap. We know it exists, yet everyone is still buying Windows computers running versions of a proprietary operating system we know Microsoft will stop supporting within 8 years (at least for Vista through 8, we still have no idea what Microsoft is doing with 10 going forward, and they honestly can do whatever they want - they control the software).<p>I mourn those stuck on XP, destined to be exploited for eternity by the thousands of malware payloads targeting them now, but you are right in nothing can be done about them really. But the real injustice is every person without the time to learn new systems (and that is a barrier on Windows <i>and</i> Linux - try switching someone from XP to 10 and it as massive a leap, or even more massive, than going from XP to Lubuntu).