Having concluded our discussion of the two basic categories of loshon hora (derogatory or harmful information), it is important to note several rules that apply equally to both:
Loshon hora is not limited to speech. Included in this prohibition is communication of derogatory or harmful information through any means. Therefore, writing loshon hora, or using code, sign or body language (e.g. a cynical smile or rolling one’s eyes upward in exasperation) that communicates something negative or harmful is forbidden.
To show others a letter or article that would reflect badly on its author is forbidden, as is revealing the identity of the author of a work that is known to be of poor quality.
It is also forbidden to show photographs of people which they would find embarrassing.