I honestly cannot believe what I'm reading. Two people who plan to go into the honorble field of medicine bragging about stealing materials. This has nothing to do with any high horse; it has to do with honesty and integrity. No matter how you spin it, it is thievery. I hope, and not for vindictive reasons but more so for you to gain some empathy, that one time someone steals from you blatantly and then brags about it.
You know very well it's illegal, just like pirating music, movies, and books is illegal. Just like walking into a store and taking clothes or food is illegal. You can't simultaneously be smart enough to get into medical school and claim to be ignorant of something so obviously illegal. At least be honest that you know it's dishonest.
It's magnanimous of you to justify your actions by telling yourself you are Robinhood. But to truly be Robinhood you must take your quest long past the $400 for prep materials to helping people not pay the $5000 or so for applying and the $200,000+ for tuition to many medical schools. This should help your personal statement and be one of your top three activities when you fill out your AMCAS app.
The thing is, I doubt you stop to fathom that the companies you are stealing from give back to help people. It doesn't help you justify your thievery, but consider for a moment the work Princeton Review does in the community to help underpriviledged kids get to college. Kids at our local high school can get a free course and help with counseling because of their generosity. Berkeley Review employees and owners support amongst many other causes, the Salvation Army, Wounded Warrior Porject, and Project Angel Food. Kaplan I know helps with Doctors Without Borders. You may think you are being altruistic, but you should know who you are stealing from too. I'm not going to say these companies don't make money, but you can't say they don't help people.
There's nothing I can do beyond ask you to please stop your dishonesty. I know you are choosing not to consider it, but your actions have consequences you may never directly see. If you steal from the small local grocery store and brag about it, causing others to do the same, and then that store goes out of business, you have done far more harm than you figured with your actions.
You stole those materials when you bought illegal copies. Now you are trying to pile on by encouraging others to steal. Please stop. And if you get the itch to do the right thing, and you don't care about money as you claim, then why don't you take the $310 you should have paid for your BR books and donate it to the Wounded Warrior Project? or some other worthy group in need? Let your actions support your words.