I have since been corrected about removing the guard on my own pin (yeah!), but the justification given when it was told to me was: when you're an alumna, you are a member of the GLO as a whole, and no longer "just" the one chapter. Even as I type this, it does sound rather lame!
Gosh darn it, I'm going to get those dangles I've earned, and put them on my guard like I've been wanting to do! And enjoy it!
honeychile