Anytime you are anywhere in an arc of 180 degrees from the nose of your opponent and you take a shot, you will be accused of being a HO dweeb.
Your altitude in relation to your opponent is not a factor.
This is in accordance with the rules set forth in the Queensbury Rules and Regulations for Aerial Pugilism.
There are no provisions for deflection shots in these most prestigious set of rules. Therefore they are not to be inferred.
I find that most pilots actually do follow these rules quite commendably. I cite as precedence for this statement, the fact that, never has there been heard on Channel 1..."Nice deflection shot dweeb!" ...
We thank you for your enquiry Sir, and hope this answers your question fully.
Cheers, and good hunting
RTR