Would it be possible to lower the resolution of the MBA product page preview to deter pixel-for-pixel image theft? The lower the quality, the less likely thieves are going to successfully auto-trace the image in a vector illustration program. At the very least it would force thieves to actually re-create the design instead of having an application batch trace in bulk - which could be a powerful deterrent.
In our opinion, having such high resolution images for t-shirt designs is overkill, and we feel a reduction in the preview size would greatly reduce design theft.