I definitely wouldn't make that an official LHO duty, I could mention it to them each and direct them to you if they wanted to take you up on it, but the recording would be done as individuals, not on behalf of LHOs, so to speak.
If someone was interested, they could set up an unofficial workers guild though, and do this sort of thing, get paid to do odd jobs etc
The problem with any script that might do something like that, is to distinguish between the triggers already recorded, and the new ones. The ident of them is a user id and the name of the spell (in this case), there's no distinguishing a person casting it twice and it being recorded once, and a person casting once, and it being recorded twice.