3D Warehouse has a few rules for using the service. For details, see the 3D Warehouse Terms of Use.
If you have specific questions about whether your use of 3D Warehouse models that you’ve uploaded or downloaded complies with the Terms of Use, the 3D Warehouse Terms of Use FAQ might help you find answers.
The 3D Warehouse Content Policy outlines what types of content are not acceptable.
If you see a model or collection that seems to violate the 3D Warehouse Terms of Use or Content Policy, you can flag the problem for review by clicking the Report Abuse icon below the model preview on the model details page or the collection page.