I don’t think so. The parents never bothered putting in effort to make their child less sickening so we’ll never know for sure but I don’t blame the kid. She was like 3 so I’m blaming the terrible parenting. There’s little that I hate more than parents who decide that since their lives are ruined, everyone else’s lives have to be ruined too.
Whenever I go out to dinner with my daughter, if she throws a fit and cries and fusses I take her outside. She doesn’t do it that often (knock on wood) but I react pretty quickly when it happens because I don’t intend to put up with it.