What exactly are you saying?
Are you telling us that commercially available Superman costumes they sell for Halloween come with a tag that actually states that "this costume does not enable flight"?
If thats what you're claiming then it's news to me, but I would actually believe it ....because...we live in a litigious society and it wouldnt surprise me that manufacturers would feel the need to guard themselves from lawsuits by attaching such a warning.
Ya never know. Some individual consumer, with just a piece of candy corn for a brain, might jump off of a roof while wearing their product...and find that they are NOT flying! Break some bones. And then sue.