If there’s one thing that Comcast seems to love more than anything else, it’s shafting its basic cable subscribers and pushing them to upgrade to one of its many pricier bundle plans. If you’re looking for examples, recall the company’s brilliant shakedown that made basic cable subscribers use digital adapters that degraded their signal and forced them to pay an extra $10 a month to get the same HD channels they used to get for free as part of their basic package. Now GigaOM reports that Comcast has blocked streaming of the Olympics for customers who only subscribe to its basic cable services despite the fact that the Olympics are being shown primarily on NBC, the Comcast-owned network that basic cable