Human vs. Machine
I have tried to keep up with this thread, but don't recollect having seen this discussion, so here goes.
Re the comments about PRIM, SEC related messages in BEA reports. The reports state it has not been established if the messages in question were the result of pilot action.
IMHO, if this information is available to the system, it should be differentiated on their ACARS signature. I'd think this is a pretty important piece of "maintenance" information.