I'm a little surprised that this hasn't been requested already, as far as I could tell. I've recently encountered 3 users who used Google Drive links to share images in their questions, rather than using Stack Overflow's built-in image-hosting. For example, see this question,
So I have a website where we have a background image that we change every now and then. We also have a blurred version of the image that we create which is set behind so when the window etc is too large, the blurred image extends out the sides. See screenshot in link: https://drive.google.com/file/d/0B2dZTsK2lVi8bUlucXVwT1R5eXM/view?usp=sharing
In one instance, the user didn't even have the link set to be viewed publicly, so anyone wishing to view the image would need to request permissions in Google Drive first (awkward).
Please Ban File-Sharing Service Links
Questions (and answers) on Stack Exchange sites need to stand the test of time. When users use 3rd-party file-sharing services such as Dropbox and Google Drive to share images (and code, etc), their posts are subject to link rot (as pointed out by Will many years ago),
I hate these just because someone uses them to answer a question, then the link dies, and the answer is now useless. Just had an accepted answer become useless because of this not too long ago.
Its [sic] a worthless way to answer a question.
Stack Overflow already does certain kinds of link detection when users post content, e.g. when low rep users are forbidden from posting X number of links, so it seems relatively trivial to implement something to always disallow links to things such as Google Drive (unless I'm gravely mistaken).