One picket against sin can be considered a form of protest, but for it to be adequate, several points must be taken into account.

A Thoughtful Solo Stand Against Sin

One picket against sin can be considered a form of protest, but for it to be adequate, several points must be taken into account. First, even if it is an individual expression of protest, it is important to understand exactly why it is being carried out. As one source states, when organizing a picket you need to have a clear understanding of your objectives in order to attract the attention of the public and authorities, and also to avoid unforeseen situations:

"When conducting a picket, you must have a clear understanding of the purposes for which you are holding it. Usually, the goals of a picket are to draw the attention of both the public and the authorities, as well as to warn off people who might accidentally join the event and turn out to be members of a sect. It is advisable for random individuals not to participate in the picket. There should be no ‘surprises’ from participants toward the organizers of the picket. Develop a detailed plan for the picket, the positioning of participants during its proceedings, and clearly distribute the tasks that each participant must perform during the protest. The person distributing leaflets should do just that, rather than engage in conversations with sect members. Any questions from sect members should be answered by specifically prepared individuals positioned nearby. The posters used during the picket should be easily readable and written in large font; the text on them must be carefully refined, taking into account the psychology of sect members and their beliefs. Light irony on the posters is acceptable and even beneficial, but rudeness should be avoided." (source: link txt)

Thus, even a single picket requires a well thought-out plan and a clear message, making it an adequate form of protest only if it conveys a clear message and does not devolve into a chaotic expression of personal discontent.

Secondly, the moral basis for such a protest stems from understanding sin as a violation of divine commandments, as reflected in the following definition:

"Sin is the transgression of God’s commandment, resistance to the will of the Lord, disobedience to God who commanded not to do evil but to do good — sin is a turning away from God, a distancing from Him, neglect of one’s own salvation, an arbitrary self-excommunication from life, and a sentence of death. Sin is rebellion against God. Violation of God’s commandments leads to unparalleled consequences for both the soul and the body, in both temporal and eternal life." (source: link txt)

From this definition, it follows that protesting sin can be seen as an attempt to uphold high moral standards aimed at recognizing and observing divine commandments. Thus, even if the protest is carried out alone, it can have a moral justification if its purpose is to emphasize the importance of adhering to moral norms and condemning actions that violate these norms.

In conclusion, a single picket against sin can be an adequate form of protest if it is conducted thoughtfully, with a clear objective, and in line with high moral principles based on the recognition of the sanctity of the commandments and the pursuit of a righteous life.

Supporting citation(s):
"When conducting a picket, you must have a clear understanding of the purposes for which you are holding it... Develop a detailed plan for the picket, the positioning of participants during its proceedings, and clearly distribute the tasks that each participant must perform during the protest." (source: link txt)

"Sin is the transgression of God’s commandment, resistance to the will of the Lord, disobedience to God who commanded not to do evil but to do good..." (source: link txt)