That's a good question! I fell for this problem with text rendering once as the font i've used in a SVG wasn't installed on the target machine.
If i create a image, i want that image to look exactly the same on all machines. This is sadly not the fact for SVG :(
The W3C SVG example files contain a lot of these files that make every SVG renderer explode. There's images that don't render anywhere except inkscape