Not the main reason I frequent Reddit, but here are some good reasons nonetheless:
http://www.huffingtonpost.com/2012/0...n_1237016.html
http://www.dailydot.com/society/luca...draising-goal/
The good of Reddit outweighs the bad in my opinion. There are so many great stories that have originated from Reddit. I didn't even realize there were subreddits that you speak of, and if they are illegal why aren't they getting shut down?