Uploading images from url rather than local hard drive

[eluser]xwero[/eluser]
I think grabbing it's safer if you only allow image storage sites. They did the security check for you.

Not only you have to be aware of the security risks but also about the legal issues. If your users grab images from others and add their own name or if the images may not be reproduced without the owners consent you could be held responsible allowing this behavior.