Protect your IP address from spying when using BT?

You are afraid of spying when downloading copyrighted file, video?

This article introduces you two ways to protect you. (http://lifehacker.com/372633/protect-your-privacy-when-downloading)
The first one is to use the blacklist, it can help you to refuse the connection from the malicious IP (someone that will track your activity)
The second is a proxy, the well-know Onion Router network (Tor) may downgrade your download speed dramatically. The other one, located in Canada, BTGuard is better, it's a subscription service.