Comment by freeopinion

What if you could submit a PR by pasting the url of a repo commit?

The forge could automatically figure out if the submitted repo was a fork, figure out the sequence of commits in the foreign repo that diverged from itself, analyze the commit comments and commit diffs to see if they jived, and add the PR if it passed the spam filter.

Then you could submit PRs without an account or even having the contact information of a maintainer.