Gru-some: Suited Minions fans face UK cinema ban after rowdy scenes

quote: The attire ... is backed by studio Universal Pictures.

Presumably Universal will be happy to pay the bills for fixing all the damage and for the refunds.

"only smartly dressed people allowed" if a stereotype of Britain existed in Japan

The attire is an homage to the movie's supervillain Felonious Gru

No it's not - it's just a joke about adults showing up to a children's movie like it's a formal event. People are making similar memes with things like the Barbie movie.