This project isn't really what you're looking for. ROMs are more program than data, and Academic Torrents in particular is scoped to scientific datasets. What you're describing is more akin to Olive, bwFLA, or the Internet Archive's Javascript emulators [0]. For any of these, I don't know in particular if anyone has attempted to create a decentralized store of ROMs/disk images, although the general rule in digital preservation is to have at least 3 copies stored in different locations. The Internet Archive might have some redundancy for ROMs via the IA.bak project, which uses git-annex to distribute Internet Archive data across multiple machines [1].

[0] https://mellon.org/media/filer_public/0c/3e/0c3eee7d-4166-4b...

[1] http://iabak.archiveteam.org/