In my 15 year career as a social worker I was involved in suicide prevention, as a young adult I knew an individual who terminated their life successfully. I worked as a Crisis counselor for a year and a half, I worked with many peri-suicidal people, pre and post attempts. I knew a young person who killed tehmselves after they moved to another town, despite their aggravating personality traits their death was a tragedy.
Slipknot's statements are irresponsible and harmful, trolling or not, what they say is unproven and harmful. I worked for two years with an individual who had mistaken magical thinking and delusions about their immortal spirit and how it would be just fine for them to end their life.
Except for the fact that it was an unproven delusion and would be harmful to their family and friends.