I think this is a bad idea. Even if they can detect password sharing, I have to imagine being the first to market with this is really going to sour customers an

I think this is a bad idea. Even if they can detect password sharing, I have to imagine being the first to market with this is really going to sour customers and drive them toward competitors who are happy to maintain the status quo with password sharing. It would be better to be the last company to do this.