I'd run it, but I wouldn't sprint on it and as another poster noted, I don't think it'd be cool to sprint near other racers on that rim.
The one in pic 4 looks like it's ready to pull through at any moment, but unless you're really going nuts, the failure would likely be just like breaking a spoke. The possibility that the failure could be worse than that is what makes it not cool to ride that rim in a race or spirited practice session near other folks, though.