I suspect it isn't 'these people' but bottom-dwelling, scum eating lawyers that have solicited the passengers to allow them to be represented.
Notice they aren't seeing BA, as the Montreal Convention doesn't consider this to be an accident, but they are going after the manufacturers.
I would have thought that airbus or p&w's notices to 'please make sure your cowlings are latched' would obviate them from any liability, but it is the US courts whose time is being wasted. We may have a final ruling in the next dozen or so years, so don't hold your breath.