Let's say that OS X marketshare went up to 50%. Now a sizeable part of the market is using OS X, which means a lot of idiot computer users to expoit.
Could it be possible to write annoying intrusive spyware/adware for Mac OS X that would pop up all the time asking you to buy the full version of some software and what not, like you have on Windows?
Is Mac OS X secure enough so that you have to be REALLY stupid to let that happen?