Or go to an "abandonware" website for free full games. Abandonware means that the software is literally abandoned, they are not sold any more and you may download them legally.
From WikiPedia:
In most cases, software classed as abandonware is not in the public domain, as it has never had its original copyright revoked and some company or individual still owns exclusive rights. Therefore, sharing of such software is usually considered copyright infringement, though in practice copyright holders rarely enforce their abandonware copyrights
Just because it's not enforced doesn't mean it's legal...
I never would advise tormenting due to the inherent security risks, but if you are feeling lucky, use a VPN that will mask traffic. BTGuard is a good one and will prevent you from being caught downloading on P2P sites. The best advice I could give is to download items that receive positive ratings and keep a good AV if you plan on downloading from torrents.
As with anything, there are always precautions you can take. However, let's not discuss the precautions you would need to take to steal something.