I was reading blogs and I found this post here from gimmie.lotsa.lovin
There are people online selling fake MAC products! There's even a blog section on there where they "review" the products saying like "it's such a great product" and what not.
I know most of us on blogger has bought mac products and have kept up with the collections so we know fake when we see it, but I know there are some others that haven't purchased from MAC.
Hopes this helps!