Gotta lot of experience with this one....
First off, if someone is really interested in something like lsd or mushrooms they will seek it out, you REALLY don't need to help them. If they display interest, help them obtain and help guide them.

Bad trips are caused by doubt, set and setting is important, but I've kept a very good mindset in very very bad situations. Those doubt triggers need to just flow through you, it's not so hard, it's just non-attachment.
Guiding someone does NOT mean tripping with them. If they take 3grams of cubes, you take 1gm. Just enough to be understanding/compassionate to their experience, not enough to get too far into your own head.

good luck!

I can certainly say what puts people OFF taking mushrooms, and thats debates and trip reports, because most of them are taken the wrong way by someone who does not understand it, probably even sounds scary. On low doeses of shrooms, if you have a bad trip, it's more than likely youre own fault for having an expectation or fear. My advice is just listen to anyone who has nothing but good to say about them, and dose a sensible amount your first time. That's exactly what I did and I have never had a single bad trip on mushrooms. I've had loads on DMT, and even had some serious paranoid hours smoking weed, but mushrooms, never.

Then are not neurotoxic, they don't absorb through the flesh like acid does, so you can abort a scary trip by inducing vomiting (though I can't imagine someone going crazy on just one gram of cubensis, it seems highly unlikely).

It's fun, it's frivolous, its insightfull, it makes sense and nonsense, it makes you want to laugh and chill, and dance and just be GOOD. It makes you connect with others in ways you never even thought possible.

This is my experience, but if you keep an open mind and just enjoy it, you will LOVE it. I understand everyone is different, but if someone really is stubborn enough to make a low dose shroom trip really difficult for themselves, then they should learn from that. You do it to yourself, and you will never know how good you can feel, beyond your imagination, because you just would not let it go. It took me years to get to that point, and mushrooms came into my life at the right time.

But for goodness sake at least try it, or else you don't deserve to feel AMAZING.

Just my two cents, do it or don't. It sounds like your friend needs some education on the matter, prejudice would be the first thing to be CRUSHED by reality, which is infact, much better than the lies Happy days!

Well, this afternoon I ate several grams of B+ mushrooms fresh from my own home-grown cakes. My trip wasn't particularly eventful, but I've come away from the experience realizing my friend or rather my friends are completely oblivious. They greeted me this afternoon with tales of binge drinking from this past weekend and then professed to wanting nothing to do with mushrooms while I tripped together with another friend in a shared apartment. I have no stake in whether or not they choose to eat mushrooms or use any psychedelics for that matter, so I don't care all that much, but it is undoubtedly something that deserves an open forum. If you haven't previously taken mushrooms, you cannot truly justify not wanting to do them. Period. It's quite clear to me now. For my friends who are indisposed to eating shrooms even when the opportunity presents itself as it has now, their objections reek of irrational fear, judgment, and of their egos. It was fun. It was beautiful. It was euphoric. It was medicinal. It was only a few hours commitment. Why wouldn't a rational person want to try them? If you approached someone with a supplement that could make them feel amazing, have hours of enjoyment, and facilitate personal growth they might say, "That sounds fantastic I would love to try it!" But then if you were to say, "Well you can and all you have to do is eat some of these mushrooms!" I'm willing to bet they wouldn't like the idea all that much anymore. Sigh. How have we managed to demonize psychedelics?

Perhaps you are correct. However i'm sure that the LAST thing they would want is for you to think that you can decide better what's right for them than they can!
I suspect that this is a sticky point. The best way to mention this would be to mention in a conversation your experiences, and leave it to that. If they have interest, they will let you know in their own time.
Maybe they are simply not wanting to make such experiences right now, and know themselves enough to realise that they most likely would not appreciate it right now. For some people, ignorance works best, rather than experimentation.

Once you've tried any psychedelic, you've opened a door that can never be closed. The idea of permanent change is frightening to people not because they're scared of what will happen to them, but because they're scared of not knowing. I don't think talking this person's ear off about mushrooms will help. You are trying to tell them something they can't know without experiencing it. You want to help this person want to know in general. Not just want to eat mushrooms.

EXACTLY!!..And most of todays society is programmed to Christian thinking. That means that they like open and shut cases, hence the fear of realising in adulthood that they have been limiting themselves is a fear they may want to dismiss cos it's easier to say "rubbish", than open those wide doors of truth and honesty.