Here's something I've been wondering about, maybe you can help shed some light on this...
There is an elderly man in the beekeeping club I occasionally go to who is very strongly against queen excluders. In his words, "a queen excluder is the same thing as a honey excluder." I asked him if he has problems with his queens laying in the honey supers, but he said that even if the queen does lay up there, after they hatch they fill the cells back up with honey, and all it does is make the honey a little darker in color. He has lots of hives and has been keeping bees for a very long time, so his opinion is respected. (in other words, it's not just some random new beekeeper's idea with no validation)
What do you think about this? Is he just an old man used to his ways, or is there really a big difference by not using an excluder?