I think it's *very important* to publicize the reported harms from meditation (any form) and mindfulness, because they are being touted as cure-alls in national health systems and in the media, with medical Drs who have no background/experience of meditation now advocating, even prescribing, meditation/mindfulness to sick patients with physical and or mental health conditions. So far it's been all 'mindfulness is good and harmless'.
People who have been directed to mindfulness by Drs/health care practitioners (HPCs), and who report adverse effects such as panic attacks, anxiety, depersonalization, serious exacerbation of pre-existing trauma, are most often disbelieved or told they are 'not doing it right'.
I first learned and practiced meditation over 50 years ago. I pretty much practiced it on and off for 50 years, various forms. So no one can tell me that I'm 'not doing it right'. I mostly don't now (I'd rather watch comedy and have a laugh). BUT, it is just NOT any kind of sodding cure all!
The first and only time I mentioned to an NHS GP that I did yoga and meditated - he bloody sneered!
Now NHS Drs think they own meditation/mindfulness/yoga, and are placed to 'prescribe' it.
A few times over the years I did experience problems, mostly in group meditation, problems of breathlessness, a feeling of suffocation, and anxiety (which I don't normally have at all). I do think such experiences, if continued, could be a real problem, especially if the mindfulness has been 'prescribed' by a HCP.
It totally *ucks me off to see meditation co-opted by corporations in the name of stress control, with the subtext of improving productivity. That's pure exploitation. Workers are directed to do stress control/mindfulness, and so to not complain about work conditions and wages. Mindfulness then becomes a means of pacifying and silencing people, to deter them from making righteous complaints.
.
EDIT ADD - In the first year (the absolute worst period) and at my worst in following years I couldn't meditate at all.
I'd close my eyes to get into 'the state' - but Nothing Happened. It was weird. I was used to getting into a meditative state just like that. But couldn't any more. It was only when I got onto an international ME forum that I discovered that other long term meditators with ME had experienced the same in their worst ME periods. Some born again meditators later suggested that maybe I 'hadn't been doing it right'.
.