The Open Source Cartridge Reader (OSCR) is a versatile tool designed to help preserve video game cartridges and save data. Developed by Sanni and the community, this device allows users to back up ROM files and save games from a wide range of vintage consoles.
Yep, this even has a name, SLAPP.
I’m not sure if this would strictly be a SLAPP rather than general litigious bullying (GLiB has a nice ring to it actually.)
In this respect though open sourcing it was a good move. Even if the creator were to be blocked from distributing, it’s out there.