Unusual sighting- etiquette of it?

[Scandia]

Today at the library I saw a customer wearing a hat with the letters of a GLO that he could not have possibly belonged to for gender reasons. If you want the name of it, I can reveal it.

I was perplexed. While I know that people can wear T-shirts of specific events that a GLO hosted even if they do not belong to that GLO, I truly do not think a person can wear a hat stating simply the letters and name of that GLO.

I do not know if this person was the parent of someone in that GLO- though it did not say "Upsilon Upsilon Dad", just "Upsilon Upsilon". I do not know if it was someone who received that hat from a used clothing donation. Hat was not in terrible shape- but was not brand new either.

What is the etiquette and policy behind this? Does it vary per GLO? Would an umbrella organization determine it- and yes, this organization is under a larger umbrella governing body.

Should I have said something to him?

I will say that it is not a GLO that I belong to- had it been, I would have commented. But this GLO belongs to the same umbrella that one of mine belongs to as well.