I agree if they have already told, people should be grown ups about it. But still I have re-emailed all my customers using the module to re-inform them. But you must understand, Sugar was asking why I was using this graph. I was explaining we are using the graphic because a lot of money is still sitting in their grid, and it was the perfect example to use, as they haven't used it for 2 years so it allowed me to show their residents getting their money drained.
But yes I agree, it should be good practice to check your balance everywhere.