SB 405 Tennessee Homeowners Association Act.
Homeowners Associations (House Bill 2070 by Farmer)—Final Report
Protecting the Interests of Homeowners: An Overview of Concerns Related to Homeowners Associations
Failure to Enforce
Neighborhood Nazis (HOA's)

No Soliciting
No Soliciting Signs in an HOA (says they are non-enforcable)
Using No Soliciting Signs in Your HOA basically the same text as above, they must be copying each other
Door-to-Door Sales: Can Your HOA Ban It? What about Political Canvassing?
To Knock Or Not To Knock - That Is The Question (linkedin)
Courts have ruled that if public/tax payer funds are used to maintain the streets, sidewalks, street lights etc. then an HOA has no legal right to enforce a no soliciting policy within that neighborhood based on first amendment rights.