I am more concerned about people claiming cc and mods than reuploading sims that you made in the game cc free from the gallery. When you put sims in the gallery for others in public to us, they technically don't belong to us anymore and giving permission for others to do what they want.You are already using Maxis and EA's work, so it belongs to them really in the end if you think about it.
Can you be upset about it? Sure, Some of my sims, buildings, etc... I especially made for myself; but I knew as soon as I shared them, that people might change or edited them and if I didn't want that, I wouldn't have shared them. Though it would be nice they still kept some of the tags and credit me, it isn't the end of the world either.
