Even in the few subreddits dedicated to it, you have to be real careful about what you post if you don't want a ban.
Out of sight out of mind... yeah, I guess it works. Reddit doesn't need suicidal people posting about this problem, it hurts the platform and they can't do anything about it anyway, to be fair.
Source: me and 4 people I've talked about it, all were previously banned. Not much, I know, but I'm confident enough they do it on the regular. Again, not really blaming Reddit here, they're a business not a charity.