Just like everything in this world someone point out his bad experience and then his opinion become famous and everyone generalizes because it gets a lot of attention. And worst, the comment section attracts all the people that had a similar experience making it even more biased; so it gets a lot of more bad press than it deserves.
So despite there could being just one false-positive-not-fixed-after-human-contact every 1 million deleted meetups, in Internet that false-positive is likely to bring a lot of undeserved negative attention.
I definitely agree that one in a million failures do tend to generate an unreasonable amount of negative press, I guess because they're easy to relate to on a personal level.
In this case however I think a valid point is being highlighted. False positives do happen but it's concerning that Meetup doesn't seem to have any way of rectifying them e.g. they deleted an event rather than disabling it.
Personally a big fan of Meetup but if this story is accurate and in the event of a false positive, there really is no way of rectifying it, I'd be concerned about using them to organise an event.
So despite there could being just one false-positive-not-fixed-after-human-contact every 1 million deleted meetups, in Internet that false-positive is likely to bring a lot of undeserved negative attention.