First I'll say that the law in Tennessee appears to me that they don't want to arrest people for simply trespassing on your property. I say because at the very beginning they give 3 defenses to prosecution. Then they give the requirements the property owner must abide by to have a person prosecuted.

(b) It is a defense to prosecution under this section that:

(1) A person entered or remained on property that the person reasonably believed to be property for which the owner's consent to enter had been granted;

(2) The person's conduct did not substantially interfere with the owner's use of the property; and

(3) The person immediately left the property upon request.

(c) The defenses to prosecution set out in subsection (b) shall not be applicable to a person violating this section if the property owner:

(1) Posts the property with signs that are visible at all major points of ingress to the property being posted and the signs are reasonably likely to come to the attention of a person entering the property; or

(2) Places identifying purple paint marks on trees or posts on the property; provided, that at least one (1) sign is posted at a major point of ingress to the property in a manner that is reasonably likely to come to the attention of a person entering the property and that the sign includes language describing that the use of purple paint signifies "no trespassing." If purple paint is used, then purple paint must be vertical lines of not less than eight inches (8″) in length and not less than one inch (1″) in width; placed so that the bottom of the mark is not less than three feet (3′) or more than five feet (5′) from the ground; and placed at locations that are reasonably likely to come to the attention of a person entering the property.