And lawyers are concerned about logo size exactly how???
Dress codes to maintain decorum that keep the school from looking like a dive bar get a thumbs-up from me. Logo size...not so much.
That's the point. They have to use an inherently meaningless rule in order to avoid being sued for "discrimination."
Prohibiting clothing choices because they are vulgar, provocative, disgusting, profane, blasphemous, gross, etc., etc., involves personal judgment on the part of administration. Schools are threatened with lawsuits when they use personal judgment. If they told this young man that he could wear his Leukemia Foundation race t-shirt, on what objective, consistently applicable, unvarying basis could they prohibit shirts with any other messages?
Does this make any sense? No, it doesn't, but it's the situation in our first-world schooling establishments.