Morality Of Suicide
Reasoning of an individual or a few people does not matter. Ethics are societal norms that are derived from fundamental morality which is universal. Suicide is considered unethical everywhere in the world and has always been. If you come across an individual who is trying to commit suicide, it is your moral obligation to try to stop them. How that is achieved is dependent upon the situation, your relationship with the individual, and a whole lot of other parameters. Perhaps the least one can do is to is to notify the authorities.