The best people to ask would be the merchant who sells them. If a product is recognizable by design, I would assume it can lead to IP situation.
Much like Tom Waits or the golden arch,etc...
As for just upload and try. I am not even sure this is the best thing either. In IT infringement, the contributor is responsible. At least that's how I understand the Agreement we sign.
Maybe someone with IP legalese will be able to help on this.