Although it may not be spying in it's purest sense, your internet service provider is keeping tabs on your account. Due to the nature of the technology, p2p applications will share your downloads with other users who are searching for the same content, hence peer-to-peer. If an ISP discovers that a large percentage of a internet-user's connection is comprised of this p2p traffic then they may decide to take some sort of punitive action. Their weapons-of-choice being either: connection throttling or account cancelation. Connection throttling is a fairly self-explanitory process, meaning, in laymen's terms, that your max possible connection speed is temporarily reduced until the situation is rectified. This action will affect any application that connects to the internet, not only p2p software. To avoid these possible, weekend ruining consequences you should avoid being too generous and remember to take breaks from time to time. Locate your uploading or seeding settings(the specific name is dependent on the application) and make that the max upload speed is set moderately below your connections max upload speed.