Has anyone ever invited someone to something hoping they wouldnt come? If so, y invite them if you dont want them attending?

no

They do that because they don't want to cause a rift between them or get talked about that you didn't invite them.

To be nice, and make it seem like you care. Ever offer candy to someone even though you want it? It's like that.

No, but I was the only person in our whole family not invited to my cousin Mary Claire's wedding and I took that personally and hated h r it for years. We've since made up though.