Interesting, could you please share more info about how people get into troubles with harmalas?
Sure thing. The first time I shared extracted harmala fb, it was with a random person at a forest gathering in the wake of a group discussion about ethnobotany/Ayahuasca/etc that we'd both attended. I very clearly explained to him that the capsule (it was size 0 or 00) was not a dose, but simply the most convenient storage device I had at the time. We talked dose ranges and routes of administration (I think I even suggested that smoking a very small amount of the fb would be one way to get a sense of the effects before oral dosing). I stressed repeatedly not to mix it with MDMA and to check before combining it with other substances. There was more, but that gives the gist.
We went our separate ways, but I randomly encountered him over a year after that gathering in completely different circumstances. He came bounding up to me and exuberantly told me about his experience eating the whole capsule, puking his guts up, collapsing into the bushes off the trail, and just generally white-knuckling his self-administered harmala OD. On the plus side, he didn't seem terribly worse for the wear, but that was my first eye-opener, and thank goodness he only took a bit too much rather than deciding to combine it with MDMA or something else that could've caused serotonin syndrome. After that I decided never to share with randos, as a general principle.
After that, there were some incidents with friends, some more knowledgeable than others, again mostly owing to dose (like a friend who was super sensitive starting at 250mg when they probably should've started closer to 125mg and getting way more full-on effects than they were going for). But there was also a case of someone taking them with mushrooms at a higher dose than I suggested (and getting way more than they bargained for) and a case of a friend sharing them with another friend in a manner that made me worried that the friend of a friend was unprepared/lacking important understandings as far a risk/safety.
I get that there's no such thing as perfectly "safe" drug use and everything has some degree of risk, and people are generally responsible for their own choices, but my role in these situations made me uncomfortable and I saw ways where things could've gone way worse in some of them. For me, it felt far simpler/less messy to just keep it to myself and only engage if/when I stumbled across people who already seemed to know enough to avoid those kinds of situations. But even on a thread like this I'd feel ways about sharing my past psilohuasca dose numbers, not because they're secret/sacred/unimpressive/massive/whatever, but simply because I wouldn't want a lurker to point to my post as being a safe/proper/appropriate starting dose for them without them otherwise testing the waters. And that's on a relatively quiet forum. When you consider the quality of the discussions taking place on Facebook and similar social media it's hard to not feel like, "Those who know don't speak. Those who speak don't know," and that also informs my general zipped lip approach.
Generally speaking I'd be more inclined to tell people who raise the issue of psilohuasca to start lower with both sides of the equation than they think they should, and dial it in from there based on their experience/neurochemistry/desired effects/etc. Admittedly, that's more about me not wanting to feel responsible for contributing to anyone accidentally blowing their psychological doors off or otherwise getting into trouble, but it's not like I have control over much anyways, so a clear conscience on that front feels good, in light of past experiences.