People like to feel like their contributing to a perceived problem, while not actually doing so. They do stupid things like have posters, and advertisements, where they tell you of all the supposed benefits of life, and all the supposed down sides to death. The people whom attend these events or post about them online, are doing nothing to actually stop this so called issue, which is by design of course. They want to feel like their helping without actually putting in the time to do so in the first place. It merely just to gain social credit as to boost ones standing in society, and to allow for a sense of arrogant superiority over those who, They perceive as doing nothing to help the cause they seem to care so much about.
These event never actually prevent suicides, I have never heard of life being preserved, from any one suicidal person seeing a stop suicide poster, rather I have read that in some instances, it actually brings back passive suicidal ideations, as you are constantly reminded of suicide.