How do you relieve your friend of his depression/suicidal thoughts? You do nothing and wait for the news in the morning paper everyday.
I feel bad now. Why would you make this kind of joke about people with a mental illness?
I don't care about those losers.
Joking that it's okay for people with depression to kill themselves could be very hurtful. You should consider what it would be like if you or somebody you love was affected by depression.
I find humor in everything that people mistake as depressing. Depression has no cure, so you can't get rid of it.
While some people use dark humor to cope, I think it's quite heartless to take the joking seriously. Depression is a really difficult condition to live with, so can you try to listen to what they go through? They deserve a lot of care and love from you instead of jokes.