Solicitation by, or collusion or joint participation between or among, any manufacturer, distributor, producer, wholesale customer, consumer, or any representative of any of them, to commit any of the unlawful practices which are prescribed in this article, or the use of any misrepresentation, threat, intimidation, or boycott to effectuate the commission of those unlawful practices, makes any person that participates in those unlawful practices subject to the penalties of this chapter.