The Supreme Court has been asked to intervene in a ruling won by UMG, Sony Music Entertainment, and more, which forces an ISP to terminate customers for piracy.
I won't use a phone company that listens to my calls and criticizes me for who I speak with. I won't use an internet provider that monitors what I download or shares that info with third parties. The only other way to catch someone downloading, is if an agent of the copyright holder is uploading the torrent file.
If you hire private security to give me free beer outside of your store, you can't accuse me of shoplifting because I accepted the free beer.
Assuming no VPN is being used, to get your IP while you are seeding, they would need to be connected and downloading. When downloading a torrent you are also sharing the parts you have already downloaded with other torrent users. The agent of the copyright holder has to give the copyrighted material away for free in order to see the IP address of the seeders. By giving it away for free while in the employ of the copyright holder, they are authorizing the sharing of the material.