I’ve always ment for it to be helpful, but I can see it being read rude or passive aggressive. Thank you in advance for your time and your thoughts!
I worked at one of the most high end restaurants in my city for a few years. It felt wonderful when someone stacked plates, because the majority of customers expected every little thing to be removed as soon as they finished. I always stack my dishes now, and put all the garbage on the top plate (never in a cup, cause the ice gets dumped in a different place)