YouHaveDownloaded's database contains over 97 terabytes of data, including details of 51 million users, 100,000 torrents and almost 2 million files. To protect yourself against this kind of data harvesting, you can use a proxy or VPN, or private torrent trackers.
The site’s owners claim to already be tracking around 20 percent of all public BitTorrent traffic, and their database has swollen to include well over 51 million users, 100,000 torrents, and almost 2 million files totalling more than 97TB of data.Source: Neowin
The database is growing, and it’s searchable too. When people visit their site, they’re immediately greeted with their download history, if the site has been able to harvest data from their IP address, but users can also search for files and other IP addresses to see who’s been downloading what.