You can also use Github orgs for organising repos. Nothing stops you from putting all the forks into a "anishathalyes-forked-repos" org with no members.
I've thought about doing that, but I find the "Merge branch 'anishathalye-forked-repos/...'" that appears when people click the merge button on GitHub unattractive.
I don't think people pay attention to that usually. I don't care what whoever created PR called their branch.
If you called it anishathalye-contributions it would seem fairly friendly to me.