To be honest, that's important information that's tucked away in the middle of a block of text. Many healers (including myself) didn't realize that they couldn't use first aid on someone below -9 (us healers do discuss healer things sometimes!). As we were cleaning up at the last Final Haven, someone told me that they had to use [a good amount] of cure potions to bring someone out of the negatives. With the amount used, this person would have been below -9. An honest mistake!This can be done through the use of any skills or items unless their Life Point total drops below -9; normal healing skills, potions, and items cannot be used, and you may only use skills or items that specifically state they may be used below -9.
I brought it up doing the last WH meeting using the analogy of an intersection with no stop signs. The people claim there have been many accidents at that intersection and have pleaded for the installation of a stop sign, only to be told that they should know better and to stop at that intersection.
Apparently they don't.
This information in the rule book needs to be better distributed throughout the rule book and attached to skills and items that need that stop sign. Transfusion already has the disclaimer "(but no greater than -9 life, lower than -9 life requires certain skills to heal)" - so why not add that to first aid too?
As for cure potions, this one is really easy! The description of cure potions are just "Cures 2 LP of damage. This may not raise your LP above their maximum." Add the wording, "Cannot be used on anyone below -9 life." Put that information right on the tag so people have that information right with them!