"Rude" is a strangely chosen word here. Rude towards whom? I could maybe accept "misleading", but as a person who don't believe OSI has an ownership of the term "open source", I don't think it's misleading either.
I used the word "rude" carefully here, because I'm not confident that I can make a case for it being illegal or even necessarily misleading (though I personally think it is) - but I'm happy to declare it "rude", partly because rudeness is in the eye of the beholder so I get to determine if I think something is rude or not myself.
