I love this stuff. One of my favorite sessions of D&D ever was when I was running the classic three parter The Desert of Desolation, and in the second part of that trilogy there's a bit where the players are looking for a missing princess and one of their leads is a group of Drow slavers operating under the city, and of course the instant the players learned that there were slavers they dropped everything to crush them and free the slaves. I was so proud.

I bet some of those players are still here, actually. We should play again.