it was rumored that people at reputable places like the mac store or geeksquad secretly copy your personal files to their portable hard drive, here is the scenario.
i do not condone use of the mac, nor do i recommend it, this is just a "what if" situation
lets suppose you go to the mac store and have the guy transfer your files from a pc to a mac, someone on youtube commented how the person who works on the file transfering brings his own personal hard drive so he can copy the goodies from your hard drive to his without your knowlege or consent,
file transferring to a different OS, seems complicated because portable hard drives formatted for windows will not work on a mac unless you format it again to work on mac. my major concern about technical support isnt really about security, it is more about cost, like why pay some guy $100 to run a recovery cd to fix my laptop when i can order a recovery cd from the manufacturer for about 20 bucks? when it comes to computers there are 4 essentials, common sense, virus protection, file backup and windows recovery cd.
in todays economy, people will do what they can to get their hands on other peoples digital valuables.