You might steal their 1024x768 representation of a photograph with some of the worst color accuracy possible (because it's a projector) while still looking acceptable! And, with some up-scaling, might even be useful as a laptop's wallpaper. Well, as long as you can get rid of the distortions caused by your angle (maybe you used a tilt-shift lens?), and all the imperfections from the projection surface, fix all the color issues that came from the poor representation, and somehow explain why you needed a tripod in the back of the room. Oh noes!

I jest, but they probably put that their as a CYA :/. Also, technically, all of their slides and images are protected by copyright. They did, after all, create them.

[edit: clarifying, improving grammar]