As a former police officer, I can tell you that the general definition of entrapment applies to governmental officers and the actions of their agents. These are private citizens acting independently.
de·scrip·tive (d-skrptv) adj. 1. Involving or characterized by description; serving to describe. 2. Concerned with classification or description: a descriptive science. 3. Grammar a. Expressing an attribute of the modified noun, as green in green grass. Used of an adjective or adjectival clause. b. Nonrestrictive. 4. Linguistics Of or relating to the study or the description of a language or a specific stage of a language, with emphasis on constructing a grammar without regard to historical development, comparison with other languages, or advocated norms for correct or proper usage.