I am an IPAer. We who work for Brown have had problems with management spying on us through FaceBook. It is not secure.
We have our own private forums (mostly the Bar & Grill) that are password protected for union members. They are not secure.
It amazes me how much money our company spends to snoop on us, but they do. I don't expect that it is much different at Purple. FWIW be careful.