Alright, I think discussing the finer points of defending and strategy is not really productive here.
For non-participation in a Battleground our teams look at the relevant data involved over several matches. What that usually means is that if you look at the data for most, if not all of the matches, the person usually has little to no healing or damage done or other indicators of active participation.
If you believe that our conclusion was incorrect the only means of disputing it is to submit an appeal.