In a continuation of the serious consideration our standards bodies place on keeping the Internet relevant to society, today the IETF has issued RFC8267.
are often terminated by network devices. … IP routers and middleboxes, such as firewalls, often terminate packets
that do not comply with a predefined policy
. Unfortunately, some filtering policies cause false positive or unnecessary packet termination. Moreover, these wrongful terminations are sometimes biased and discriminate against packets based on their color, age, origin, length, or IP version. – RFC8367