Kid probably was creating a PR to brag tomorrow in school!
Are we looking at the same pull request?
https://github.com/EpicGames/Signup/pull/24/commits/4e531d5c...
That's ... a super crap PR, hovering near trollish behavior territory.
I'd call those minor (valid, of course) changes, not low quality changes like what led to this post.
Even if it sent push notifications to everyone's browser and phone that doesn't seem much better. When you type an @ it gives you are description of a group and the description makes it clear that it's not the people related to reviewing his PR. He was just trying to send as many notifications as possible to try and get people to look at what he did.