I am curious, when you said that you were left out (essentially a victim of either inadvertent or purposeful discrimination), did you try to educate those around you to how this made you feel? Did they still insist on leaving you out even though they were aware of the situation and how it could be construed? This is something that happens, and I wonder what your opinion is on people still "forgetting" is in these situations. After all, wouldn't you find it odd if someone with the amount of education you have had in how to treat others with equality and respect was treating someone poorly "accidentally". It seems fairly unlikely that certain people would be unaware of how certain actions could be perceived. There are gray areas of course, but some actions are obvious.
I did, although nothing really changed. I was invited once. However, it was my reserve weekend, and I couldn't go. After that, they scheduled everything for my reserve weekends and posted flyers, knowing that I couldn't go. I'm sure it was purposeful, but of course, I could never really prove it if I tried.