Interesting. That was the original behavior of the plugins when I submitted them. My rationale for that was that since groups are defined they should be included anyway, I mean there is not damage in importing them. Campbell Barton argued about a UI option and I added it. At the end of the day it was more important for me to have the updates in the new code release than trying to argue philosophical points. 
Anyway, let us know how it goes.

Paolo

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