Re: Serious question...
At the moment you need a certain degree of intelligence and experience to install Ubuntu - and sudo annoys new users enough so that they go read up on it and discover that in reality it really is necessary.
But as Ubuntu is becoming more and more popular, it's creating a double edged problem. It is attracting more "stupid" users AND because of a wider user base, Ubuntu starts showing up on the radar of companies/people that specialize in getting malware installed on computers.
The good thing about Linux in general is that you can't really phone tech support! you need to search google or get involved on a forum. In the public space, people talk and if some company does include a root kit or malware, the news will spread much faster.
Also - Linux in general installs 90% of the app's from a controlled repo. If a good enough application comes along and people like it - it is usually included in the repo and so it stays within the closed loop of control. A malicious programmer/company will have a real hard time sneaking in some malware and keeping it there.
So even if Ubuntu becomes more popular than windows, it has a very good framework in place to keep most of its users safe from downloading crap.
My philosophy in life: If it's not broken, tweak it 'till it breaks.