Shock the public
▶ Self Immolation
▶ Suicide by Cop
▶ Death by train
▶ Hydrogen Sulfide („H2S“)
▶ Hunger strike
To shock the public is an effective instrument, to make public aware for your concerns.
Very effective (and long or ever admonishing), when suicide is filmed, and will be posted on the Internet with suicide note. Look at „Message Board“ for a voluntary videographer.
The same mechanisms as in a killing spree. But without physically hurting other people.