I agree completely; there were a lot of formalities that were neglected - and had they not be neglected, there would be less backlash against the researchers.

However, this doesn't change the fact that vulnerabilities were demonstrated, nor does it change the implication that auto manufacturers are excessively sluggish about security patches on things that can and do kill people on a regular basis. Even an imperfectly-conducted demonstration like this particular case is preferable to such a demonstration not occurring at all.