and why on earth would someone want to go a killing Radar or hitting HQ's in the Dueling Arena?
You can't blame any player for this, especially new ones not knowing at all what a HQ is.
In my opinion it's a clear design flaw. How can you put up a seperate "bomber's run" area with nearby 10k bases and HQ's as targets and then not expect anyone to bomb them?
It's an open invitation. It clearly looks as it's meant to be bombed.