Easier said than done when you consider how many games they made and how many copies are floating around out there.
At best we could get it taken out of the museum copies and the versions uploaded to the forum, but that’s still a lot of work to do, especially when it’s likely that the task would fall to a very small number of people.
It’s not the firmware, it’s just the data on the flash chip.
Overwriting that data is precisely how people load new batches of games onto the chip.
The problem is that the data is already on the chips and most have probably already been shipped off to retailers so they can’t be easily recalled or corrected.
Games already being on the chips when people buy them was supposed to be one of the selling points, so trying to get people to redownload a batch of games before playing them isn’t going to look very good, and it’s probably a losing battle anyway.
It would be possible assuming there are units that haven’t been shipped out yet, but once again it’s a fair bit of effort and that’s only part of the battle.
At the moment our best weapon is probably word of mouth really.