Logos and products on POD sites

[Yure]

I'm a bit confused about the use of some images in POD sites like, say, Zazzle.
I have some images of a Harley Davidson motorcycle: I assume I can use them in stock sites as editorial, because commercial use is excluded. On Zazzle, anyway, I can see many images of motorcycles, cars and other products, with design, logos and so on, well visible. Isn't this a commercial use?

[stockphotoeurope]

Zazzle asks us to tick a box declaring that we have the right to upload an image, and reserve the right to remove potentially infringing images but they don't check in advance.

So it's up to us to decide. Personally, I wouldn't take the risk to upload potentially infringing images. Others probably don't care as much - especially if they are not professional photographers/designers and know little about copyright.

This is their policy:
http://zazzle.custhelp.com/app/answers/detail/a_id/424