This is Bad News, seeing as Target is also tracking every thing you've ever purchased[0] and using it for marketing purposes. I wonder if they also got ahold of not just credit cards and PII, but also purchase history.
I wonder why they're not using this information to contact their "guests" directly? Why should I need to read about this revelation on HN, when they know everything about me.
[0] http://motherboard.vice.com/blog/target-knows-you-re-pregnan...