I wish the staff the best of luck. You guys are honestly in a catch-22 situation. No matter what you write as a warning to people, some will take offence or take it the wrong way. That's the nature of people and also depression on top of that makes it even worse. I know myself that when I was at the height (or bottom depends how you want to look at it!) of my depression took things the wrong way. I took them negatively when my friends honestly didn't say anything wrong. You kind of go for the worst case scenario. Also everyone's depression and how they handle it are different.
I think you guys have made the right decision. The members on this forum, as well meaning as they are, are not counselors. There was only so much my friends could do for me and that was more in a listen to me rant when I was upset or listen to me cry and just be there and try and distract me (which was a tactic that worked well for me). There is only so much anyone can do and while suicide does need to be taken seriously, this is an online forum. There is only so much that can be done.
Best of luck.