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Very good. Yes, excluders can sometimes not just discourage queens, but workers also. I know of some beekeepers who term them 'honey excluders', because you get some hives which will store honey in the broodnest rather than the supers, causing all sorts of problems with swarming, etc. I know that when you open a hive with a load of drones trapped in the supers, there is a lot of buzzing (droning!) as they take flight. Can give the appearance of the hive being really angry, but it's not necessarily always the case, just harmless drones!Good luck with your apiaristic endeavours!