Whilst I like the service to the wanna-be-hidden uploader I think this puts you into too much risk yourself.
Imagine someone creates a torrent containing child pornography (of course taking the most extreme example) and uploads it to your server - YOU will be responsible for being the initial seeder of this torrent. I don't believe the laws in the Czech Republic will care that you tell them "oh, but it ain't my data - somebody anonymous uploaded it to my server". You still are seeding it to others.