SL/Dance Bubble Etiquette

Is it wrong to walk around with your dance bubble, taking the chance that you might envelop a dance partner against her wishes?
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Once inside the dance bubble, should your dance partner dance the same kind of dance as you? For instance: if you dance Moroccan and she dances Club dance #3, the chances are greater one of you will get knocked out of the bubble. This is due to the kinetic relationship of hips banging into other hips. If you are dancing synchronously, however, both of you tend to stay in the bubble.
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Is it polite to smoke in the bubble? Even in a non-smoking establishment, you should have the right to smoke within your bubble. Especially if you inhale and smoke responsibly.