It depends on your user base. As a rule of thumb, you only have to worry about the users you target. If your customers are mainly/only in the United States, you should follow US privacy law. If your customers are mainly/only in the EU, you must also consider EU privacy laws. The European "Safe Harbor" privacy regulations were recently struck down, in favor of a set of rules called the General Data Protection Regulation (GDPR), which do not come into force until 2018. Prior to these regulations being enforced, PrivacyOwl will be updated to include the appropriate compliance content.
Yes! For example, the state of California has a very advanced privacy law sector, based on the California Online Privacy Protection Act (CalOPPA). This act is applicable to any individual or entity that owns a commercial web page or an online service that collects and uses personal information from an individual living in California. PrivacyOwl™ policies are CalOPPA-compliant, thus helping to protect your business from legal action.