A lot of this discussion seems to boil down to several key issues: 1. Should you ever refuse service to someone because you disapprove of their lawful activities? 2. If so, where do you draw the line? 3. If so, how do you deal with the fact that you can only enforce the policy when a customer's activities are specifically brought to your attention? To answer #1, I'd make an analogy to the social responsibility rules…
I think this is a great summary, but it misses one key point. There's a big difference between refusing to buy a product from someone you find unethical and refusing to sell a product to someone you find unethical. The difference how this impacts all of the other potential buyers/sellers out there who are ethical. Google and Facebook ban people's accounts all the time for doing things they find disagreeable, and they…
Likewise, if you have clear TOS terms regarding prohibited activities like patent trolling, then patent trolls should just refrain from signing up. I don't see what would cause the "state of fear" provided customers are clear on what the rules are.