those people who say that they wanna kill themselves but dont mean it to them i say go kill yourself
Are you trying to joke about people inflicting self harm?
No, I just don't care about people who think about doing that. They are usually a waste anyway.
If someone is displaying suicidal tendencies then you should try to get them help, not encourage them. If someone harms themselves and you did nothing, you'll feel guilty for not acting. Their families and friends would also be extremely upset to lose their loved one.