>I have a couple of neighbors complaining about my bees on their =
>hummingbird feeders in large numbers..........

Arnold:

Your neighbors do not have much choice except to replace their
feeders with a version that has a longer tunnel down to the
syrup - okay for a hummingbird, a bit too long for a bee to reach.

I am not aware of anything else that you can do - except steal the
feeders in the middle of the night :-).

Al Needham
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                            Scituate, MA.,USA
                            Visit " The BeeHive "
           Learn  About Honey Bees And Beekeeping
               http://www.xensei.com/users/alwine