1. A public transgression that may lead others to sin:^[1]

If a child’s transgression is likely to become public knowledge and there is concern that it may lead others to believe such conduct is permissible due to the absence of protest, the Beis Din^[2] [and others^[3]]  are required to formally object to the actions, regardless of whether the child is acting in their own interest.^[4]

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[1] Admur 343:1 “Admur 343:1 “Furthermore, if it is a matter that becomes public and there is concern that those who hear about it may err and say that such a thing is permitted, one must protest even if the minor is acting on his own initiative. For example, if he blows the shofar on Rosh Hashanah that falls on Shabbat, since the sound is heard publicly and people may come to err and say that one may blow [the shofar] even when it falls on Shabbat.”;.”; Admur 588:6; M”A 343:1; Ran 9b; Beir Heiytiv 343:1; Piskeiy Teshvuos 343:2

[2] Implication of Admur ibid; Admur 588:6; Vetzaruch Iyun regarding if others excluding the father re obligated to protest the child’s actions. See sources in next footnote

[3] Implication of Admur 343:2; Piskeiy Teshuvos 343:2 [This obligation to reprimand and correct improper public behavior is not limited to the Beit Din, even though they are the primary subject discussed in this halacha. Rather, this obligation applies to every individual. This is made explicit by the wording in the beginning of the next halacha, where Admur states that all of the above applies when dealing with “other people”, clearly indicating that the responsibility is not confined to judicial authorities alone.]

[4] Such as for example if the child was blowing Shofar on Shabbos Rosh Hashana then since people hearing the Shofar may think that one is indeed meant to blow even on Shabbos Rosh Hashana, therefore the child is to be reprimanded. [Admur ibid and 588:6]