1. Intranet hostnames may include private information, like project names, division names, application names.
2. Intranet hostnames may include information that is difficult for a third-party to accurately assign to topics.
3. SaaS applications that use subdomains may include significant information in the hostname. If, for example, it were known that an M&A deal room application had a hostname of "siliconvalleybank.dealroomapp.com", it could move the stock market.
4. For some SaaS applications, the intent or consent to share topic information may be at the instance or even user level. Some instances of a wiki might not be sensitive. Others may be.
5. Many site terms of service would prohibit disclosure of the hostname or sufficient information to assign a topic.

How does the Topics API envision managing these aspects?