Solipsis, not to be a pain here, but that's just as anecdotal as everyone else. I'm not aware of any actual science behind mushrooms causing determintal damage to CNS or brain development, or even hormone levels after the half-life (depends on species, no?). That said, it's also not my area of expertise (the neuro chem behind psychedelics and it's effects on development), so feel free to correct me if there are any good studies out there.
You do realize that I admitted to that and that my point was not that with waiting until you are 18, you're in the clear and there is nothing to worry about whatsoever? I said that there are no guarantees either way but that does not mean my entire argument can be thrown out the window and any arbitrary line drawn is all the same and it doesn't matter. That reminds me of nihilism. The fact that I cannot prove that 18 is where the line should be drawn does not mean that the only thing to go on is if you feel you are ready.
What if an 11-year old comes to ask you if he can take mushrooms because he feels it is his time. What do you tell him? Do you say: not a single person can tell you this, decide for yourself... so if you feel ready just do it? I'd call you a fool if you do. So then, if you reply: no... what then is the right time? Then you have to draw the line somewhere. And if I have to draw the line based on what my whole life tells me about people of all ages up to about 20, I say 18 based on the logic I have explained already and will not explain again.
Obviously the most cautionary advice would be to not do it until you are 18. That being the case, I started my first ventures into psychedelic space at 15 (acid) and shrooms at 16. I never do them often or take a trip lightly. What others are saying about your setting is right, you don't want your first experience to be one where you are worried about making noises etc. If you aren't in the right mindset to be tripping, then don't. If you feel you are, ultimately you are the one to make that choice - just be as safe and responsible about those choices as you can.
Yes, most cautionary advice is to say 18. That is: most cautionary but in my opinion entirely within reasonable limits. I believe this was the question so it seems we agree.
If the question is formulated a little differently, like the second one in the OP: I am 15 and have already decided (hypothetically or not), whether you condone this or not - what do you say about this?... Well then there is only the setting to discuss which I have done only briefly.
But still it lashes back: a bad setting which is related to the mindset of being of young age and having your parents' restriction... that means you cannot escape the fact that you are not an adult yet. I am not saying this because I care so much about the fact that the responsibility of minors still lie with their parents. I do acknowledge that people under 18 can make decisions for themselves (whether they are always right is another question but that also goes for adults of course). Still you are likely to be treated as such, fair or unfair it doesn't make a bit of difference.
So still, it is IMO best to wait until you are 18 and/or move out and can be free in what you do. I think this is significant for the meaning of your trip, it wil allow you to make the best of a psychedelic trip's aspect of freeing yourself. If you decide to do it before 18 and have not moved out, then dry your mushrooms if they are not dried already... research how to store them properly, then arrange for some opportunity when your parents are away and will not be back for 1-2 days and preferably get yourself a proper setting, a place where no one will care if you want to act the way the trip makes you act.
For every element that does not correspond with what I suggest I would lower the dose partially. Like if your parents are away for the weekend but you still only have your own house at your disposal then limit your dose to like 1.5 grams. Actually for your first trip at a young age and even at 18 or above, I would not go past 2 to 2.25 grams either way. I think 2.25 grams (well in my case 22.5 grams fresh which translates to 2.25 grams dry) was definitely potent enough for my first trip. It was an absolutely intense fairy-tale with difficult phases but for the most part it was marvelous.
