I have a lot of friends that i have put custom firmware on their PSPs for. But the thing is that they have no clue about homebrew or custom firmware. And with recovery mode and flashing its possible that they may damage their PSPs by accident.
My idea is that what if there was a patch that safe-guarded their PSPs. For example, it removed recovery mode (at least the portions such as flash USB access) and flash access from homebrew. The only way to mod it would be with a pandora or some other means that one wouldn't stumble upon by accident.