I think the best thing we can do with younger people is to inform them. A kid set on killing themselves will try, successfully or not, to kill themselves.
When I was younger, I tried to overdose, this was unsuccessful in everything but messing my guts up and giving me almost daily pain. A resource like this could have helped me think it through and make a more level headed decision, whichever way it went.
As Weeping Garbage Can has said, putting an age limit won't deter kids whatsoever, and a community that could be helpful in listening & letting you think things through without pushing you one way or the other (which is a thing that many communities fail to do) would be essentially pushing them away, leaving them alone in their suffering. That could be even more harmful than giving them access to method information.
I can see where people are coming from with impressionable minds not thinking through their options, but I'd rather they find this community than be alone or be pushed by horrible people to either decision (and if we were to push them away, but they happen find it anyway, there's not much we can do to stop them from just... lying). So long as we are supportive & don't try to force them to a decision, there's no immorality at play.
We just have to make sure that we're giving proper information, directing kids who ask for help to specific resources depending on their situation (that could be recommending them other communities, it could be something else), and overall be responsible with what we say. Misinformation, or a lack of information, will hurt a kid a lot more than the information we have here, and pushing a suffering person away from potentially useful resources will never be helpful for them.
Suffering doesn't require an age, so we shouldn't require an age either. I will never hold someone younger than (or different in any capacity to) me to a different standard for being suicidal, or wanting to make any other decision, and I will always do my best to help them think through their options and come to their own decision. It's incredibly sad that people's lives get so bad that they consider options as drastic as CTB at any age, especially a young one, but I don't want to take their agency away.
I completely understand everyone's issues with this, and I don't think anyone is wrong to worry either. In my eyes, it's just a matter of responsibility with how we treat the subject & other people
Edit: just a note, but I don't think "Judge" in the 5th paragraph is the word I was looking for, but I can't think of anything better for the sentence
Edit, again: Thanks to @hikikomori for helping me figure out my darn word choice