According to this news story, people who eagerly disabled their phone security in order to download "free" versions of games that they should know perfectly well are not actually free, found their phones hijacked and zombified.
It's a point I raise sometimes when dealing with Yahoo Answers requests for pirate links. If you're obtaining goods from someone you know perfectly well obtained them illegally, someone who clearly has no problem with stealing and ripping others off, do you think they'll hesitate to rip YOU off?
Sure, there are 'honest' pirates who think information deserves to be free. There are dealers who sell exactly the drug and concentration that they claim to be selling. And sometimes goods really do fall off a truck. But if you're going to deal in risky business, learn to evaluate risk!