Those new bluebirders gain a lot of experience in a short period of time. They usually learn that frequent monitoring is over doing it and get a little burned out by seeing the same thing every hour or every day. At this point they either ask how often the should be checking their boxes or they get a good bluebird book. So I personally see little harm in letting new bluebirders look at the box every hour. Yes the bluebirds may get discouraged, but that will be another lesson for those observant new bluebirders.
Lets face it, new bluebirders are usually more observant than experienced bluebirders.
My last statement in the above paragraph is my real concern. I do believe that is exactly what it is, a theory. Even with her self convincing evidence it is still a theory. She doesn't have the rules already laid out, she is willing to question what she sees. I think we just might learn something.