[quote=@Melkor]
Could I suggest an "upvote" option?
[/quote]

This is actually something I'm working on!

[quote=@LegendBegins]
I'm aware of the fact that you do not. However, is it currently impossible for the server code to accept the image redirection, and then before displaying it, resizes it in the same way it would an uploaded image? It could cause an extra few calculations, but what prevents the server from essentially saying "This linked image is too large, so I'm going to scale it down before displaying it" and output the resized version?
[/quote]

Because it's an expensive operation and the resized image needs to be saved somewhere (instead of doing it every time). In other words, it involves implementing precisely the "hard" parts of a direct upload system.

Whether the user is sending a request to my server with their image (i.e. file upload) or another server is sending a response with an image (i.e. my server making a request to someone's remote avatar URL), I have to do pretty much the same thing.

Though in the time I've spent talking about this system I could've probably implemented it. :lol