AP CSP Explore task: images from the internet

I have an issue with students using images from the web.  I want student work to see more tailored by tracing over existing images and then doing some drawing over the top.  I am coaching them to import images and then add to an infographic with research and statistical information.  I would like them to instead trace the basic image in illustrator instead of using a stock  image from google.  What do readers or other teachers think?