I am surprised that they are serious when saying "even a single person being offended is one too many". Not want to start yet another flamewar on CoCs, but how

I am surprised that they are serious when saying "even a single person being offended is one too many". Not want to start yet another flamewar on CoCs, but how is such a rule even practically enforced ? Given it's impossible to respect for a project of this scale with this many users, it just feels like a fake statement for good PR I feel like this makes the whole move even less respectful that if they'd have done nothing about the Santa hat complains