As Ren was saying, in OPhiA pledges and non-members can't wear letters. It isn't because of any secrecy of our letters--we share them with APhiO on purpose, so there are plenty of non-OPA-initiated people out there that know the significance--but because, as a service org, pledges work hard to earn the priviledge of wearing the letters.
As a pledge, I bought a t-shirt from our district formal (with letters), and then I eagerly awaited the next two months until I was able to wear the shirt.
While some of you have been saying that "hiding" the letters in such a manner is neglecting to publicize, I disagree. Plenty of freshmen arrive at college unable to read the Greek alphabet, and our pledge-friendly shirts with the letters spelled in English come in there.
