The simple answer is no. The Jewish ethic that informs my answer to this question comes from Leviticus 19:16, "Do not go about as a talebearer among your people; do not stand idly by the blood of your fellow person."  This verse is the basis for Judaism prohibition against idle gossip, commonly included in the category lashon harah. Even when someone whats to say something negative about a person for constructive reasons there are seven conditions that the Chafetz Chayim say must be met. One of these conditions is his intention must be purely to help in the situation, not to degrade the subject or cause him shame. Certainly, the case before us is not for constructive purposes even though the colleague is taking advantage of the employer's time and actually commiting a form of geneivah, theft.  Nevertheless, the questioner would only be responsible for his/her colleague misuse of his lunch hour if he was his/her supervisor or manager. If this was the situation, then the questioner should speak directly with the person taking an extended lunch hour and give him/her appropriate warnings. Only after such steps were taken could he/she report it to higher-ups.

 

Rabbi Lori Forman-Jacobi