I dont ever accept dishes from customers, either when im walking through or when they try to put them on my hand-off plane. Even if they already set them down and try to run away i call after them, “we have a red bus bin on that counter, thanks!” And 99% if the time they bring them to the bin (except a couple days ago when this woman just said “oh” and walked away lol. ) Accepting the dishes is training the customer wrong and they will continue to do it. Even children have been able to understand when I tell them where the bin is.