I'm going to go for the absurd stretch of what your post is asking. I know you didn't mean it this way, but:
Cocaine is trans-fat free. Its not good for your heart
Sugar is trans-fat free, and is not good for your heart either.
Same goes for too much of pretty much anything. Trans-fat is bad, but just because something is trans fat free doesn't make it safe.
Anastas Dimitar Martin