It's all very well saying a VPN services keep your communications secure, encrypted and away from the prying eyes of your ISP - but why would you trust a VPN provider more than an ISP? These consumer-oriented VPN services marketing to bittorrent users seem kind of sketchy to me.
Of course, your VPN can still _choose_ to log your IP address (e.g. if they're acting as a honeypot), so at some point you have to trust someone (perhaps by looking at whether there have been news reports of that VPN handing over data to other entities, ie. don't use HideMyAss).