As I've commented previously, this silly attempt to save pixels and a few key strokes on the part of the writer leads to consternation and frustration in wasting time searching the internet to come up with obscure acronyms on the part of the reader. In this case: HYP stands for Harvard, Yale, Princeton. I had to look it up, also, and my dad was a member of the local HYP Club for a short time.

However, the practice will not stop. For whatever reasons people love to use acronyms! So take this comment as humor, entertainment or as one more foible of human behavior (mine and others).

I too had to look it up, but have also found myself abbreviating, losing punctuation, and using acronyms to get the subject/thought into the subject line.

My recommendation for compromise - Acronyms for Dummies.
Perhaps if the poster's first line in the body of the post was:
HYP = Harvard, Yale, Princeton

I would suggest this for all posters using acronyms.

(I do know that SMA,P = Suck My Ass, Pat ..... I think the whole story for the evolution of this acronym is in the archives)

..I remember most stylebooks would recommend doing exactly that for well-known acronyms, nicknames, etc., unless the person is very well known by the target group; say MM here. Although now that Muffet is retired, does Michaela Mabrey become MM? Or does she stay Mike? Or Mabrey1?