Lets start with an awesome post I read this morning - Modern anti-spam and E2E crypto. It talks at length about how Google and other email service providers have waged war with spammers. He also links to a Google blog post that talks about how they decide if you should be asked additional verification upon log in attempt:
In fact, there are more than 120 variables that can factor into how a decision is made.Talk about feature engineering :)
But how is that all connected to data science? Well, all of it is classification problems, coupled with mostly reinforcement learning. Most of the stuff the guy writes about has probably never seen the light of day - all proprietary magic. Fascinating! :)
Anyways, my evening watch list has been this - videos from ICML2014. Enjoy.