Hey y'all thanks for all the responses and advice. A few things
-Just to clarify this wasn't me, friend didn't really know how strict things around sororities can be so she didn't hesitate.
-Not on Facebook, thankfully. But I've seen them.
I don't think anything official is going to be done because I'm not sure the member was being malicious, just inexperienced. I also thought that the hand thing was like official, so thanks for clearing that up! Personally, I guess this will just be in my mind when visiting them and compare to the vibe