Unless the same kid gives you SOF2 as well :-)
Well, what can I say?
Im not gonna pretend I never burned a music CD or a game from a friend, but in the end it hurts the industry.
A good example that people usually refers to is Looking Glass Studios that made Thief, System Shock 2 and Thief 2.
Many people played those games and they were considered minor masterpieces, but not many payed for them. So, no more Looking Glass :-(