Business Ethics - Uber Case Study

Analyze "Case Study 2 Uber Hits a Bump in the Road" from the attached doc and please address the below questions. 

1. What are the ethical challenges that Uber faces in using app-based peer-to-peer sharing technology?
2. Since Uber is using a disruptive business model and marketing strategy, what are the risks that the company will have to overcome to be successful?
3. Because Uber is so popular and the business model is being expanded to other industries, should there be regulation to develop compliance with standards to protect competitors and consumers?