Newsflash

Downloading pirated software from a BitTorrent feed is likely to infect your system with a trojan. Even if you have a Mac. Don't do it.

Keep using your Mac for your pirated music, movies, tv, and porn, though. Media piracy is safer on a Mac. Believe it or not, though, the only thing I do that even vaguely breaks the rules is I take my legitimately purchased DVDs and rip them to .MP4 files so I can put them on my AppleTV. I don't share them, and I don't rip discs I don't own. I pay for my music, use TiVo for my TV, and, well, I've been on the Internet long enough that porn just isn't all that big a deal. So my advice to you in sentence one of this paragraph? I don't even follow it.

My main point in telling you all this is that I've never had one of my systems infected by any form of malware. PC or Mac. Ever. It's easy to do. Just use an ad-blocker on your browser (I prefer AdBlock Plus on Firefox, cross-platform - or SafariBlock on Mac), keep anti-virus software current on a PC (AVG, Trend, and Kapersky are all ones I like), and don't believe anything you get via e-mail. Then resist the temptation to click on links that offer you forbidden temptations, say "no" when something you didn't explicitly load asks you for a password (the biggest reason Macs are usually safer) and bang - you're all set and safe.

That way you don't have to pay me (or worse, Geek Squad!) to come and fix it for you. Yay!