Get a seedbox with VPN and get usenet. Problem solved : )
I worked in IT in the past. If you download nonstop, this is the way to go (use all of the above). Make sure to get a VPN that offers OpenVPN encryption, and not PPoE. PPoE has security vulnerabilities that can give away your identity very easily. If you use VPN, you need to configure your PC/Mac to terminate the Internet connection completely if your connection to the VPN is lost. Therefore you do not have to worry about downloading unprotected.
I also know of people who have received warning letters from private torrents. There are companies/people who have jobs where all they do is scavenger the Internet to find any place violating intellectual property laws. BayTSP, for example is often contracted by NBCUniversal to hunt down these sites and the people these sites, including private trackers. If you do not have VPN or a seedbox, they can find out your ISP right away along with your IP address. At that point, you can expect a warning.
The general rule is, don't download the latest movies (e.g. In theaters or just released on DVD) or recently released music, via torrent. Those downloaders are the ones that are specifically sought after. Specifically, literally the second you start seeding/sharing the downloaded torrent, you can get in to a lot of trouble (more than just downloading).
I have (some) respect for copyright law, but the DCMA can be insane. There are exemptions to copyright law in certain circumstances (i.e. access to books in digital format for people with print disabilities, via nonprofit companies, who are allowed to make digital copies, royalty free). If there is (only) one (insane) individual who has IP rights to a book posted to a database/website intended to give access only to people with print disabilitiies, royalty free, who doesn't agree with the specific exemption to copyright law (Chafee Amendment), they can file a DCMA complaint. One complaint can ruin the website, since all of the credit card companies and banks are obligated to stop all transactions with the legitimate company. So, since DCMA effects money flow, it basically can supersede all other laws and ruin companies over a single complaint, legitimate or not.
Anyways, I subscibe to various media streaming/database services, because it is not ok to pirate things. However, all of these services have quality issues, have limited selection (sometimes even due to greedy IP owners).
There are not any decent book database (digital) subscription services for students in general. The textbook companies and the bookstores all rip us off. In fact I am pretty sure some of the paper copies of the books I ordered off of a popular website are counterfeit. Amazon Prime is a joke and does not give you access to the textbooks for university. If I could have access to any book I wanted for school, in PDF (and without some insane type of DRM-Digital Rights Management-Protection) I would be so happy. It would make my life a lot easier.
Right now, I just scan all of the textbooks I need. I have a print disability so I will not get in to trouble. Otherwise it is illegal to scan more than 10 % of any printed work.
Just remember that not all people download for fun and games. Many people do it for educational purposes.