I am not sure if this was meant as a joke or not, but for everyone who might take it serious. No. Iboga is definitely dangerous and not something to be taken lightly, but something to be researched, contemplated about and making very sure that this is what one wants to really do - and not just for a few days, but at least a few weeks.
I would no longer do things like that, unless I get a very strong inspiration for it that has been confirmed by two witnesses - or would anyone advise doing them, but I visited with this great plant teacher twice and he helped me a lot (like to the experience how it feels like having to hug a pillow for several weeks until everything in my reality felt okay again ).
That the Bwiti use Iboga as initiation to manhood is true, but well, taking Iboga for someone who is a Bwiti and for anyone who is not a Bwiti is a whole different matter. Probably the amount alone they take, when they take it for various occasions, would be lethal for anyone who isn't a Bwiti, which is estimated to be more than 33mg/kg body weight (which refers to the Ibogaine) - much much less is needed for what we might call an "Iboga experience" that can last more than 20 hours.
Apart from the spiritual and psychological aspects, the whole experience is also very exhausting for ones body and if I remember correctly, if one wants to take it ones liver and heart should be in a good condition. In an official establishment, somewhere in Europe I think, where they offer Iboga treatment for heroin addicts, they monitor peoples heart at all time during the experience (well, while lying at least, not when they are using the bathroom) - something which probably wouldn't be necessary for Ayahuasca even. Since one can fall into a state of not being able to move during and puking is also a quite common occurrence, one could suffocate on ones own vomit, when there is no alert sitter present.
Something else that might happen, which is a bit strange, is that sometimes people "just die". Well, it is one of the things I read about it and I think this was information more directly from the Bwitis about it, so there is probably no recorded medical case for this. The explanation behind it has to do with astral traveling during the experience, which should mostly affect women, and the reason the cite for the death is, that they just don't want to come back to their bodies.
Mhm. Which is not to say that there is nothing to be possibly gained by the experience, but there is a huge risk involved and the matter of taking it is a very serious one. There is always a price to pay and the experience is not a pleasant one and once down the rabbit hole, one is committed to it for about the next 16-24 hours. I would even say, with respect of course, that madre Ayahuasca - as it is much wider known - can be considered generally a gentler experience than Iboga.
So hardly dangerous, I wouldn't say so, but of course with everything it depends on what you take as a measurement you are comparing it with