You're talking about the suicidal post right?
I'm not sure how that should be handled. I've talked about s*****e before though not so directly.. I sympathise with him.. maybe instead of deleting the thread, it could have been edited to remove the discouraging content so members could continue to post and support the user. Deleting his thread completely might just make the guy feel even worse. At least with his thread, other members could jump in and comfort him..
And what somebody feeling like that needs is definitely some support from the other members.
I always thought of this place as one in which you could say exactly how you feel. Perhaps that suicidal post was too suggestive (others might begin feeling the same way) but when members are pouring their hearts out, they need our help. As for 'kids reading this board' I really wouldn't worry about that :p . It's not as though children don't experience enough inappropriate or adult content from television, movies, and society in general.. But I also don't think a kid would be looking at a site about bad breath.. Also, any kid using the internet has already stumbled upon gore, graphic sex, etc,,

It's hard to escape from if you're using the net anyway, especially with the curiosity of a child.
I'd be happy to help moderate the board if you want(I visit often enough), but if there are rules to be made, those should be determined by you, Jimi.
Maybe strict rules aren't really necessary.. Just some common sense on the part of any moderater.. You could just tell them how you would react in given situations.