The thing for me is, sneakers get an advantage over other players, just like droppers. Sneakers don't fly "the valley of death" but they go high or around, avoiding all bullets, hence no deaths. In this they just leave their teammates to die in the middle and avoid some deaths on their own score. I call that nothing more than cowardness, afraid to die and hence not willing to meet their faith. It also signals to me that you are to weak to beat the enemy, hence have to resort to sneak around him to get your win, in my opinion, the other side then deserves the win more. Multiple pilots also hate droppers and campers, because of them resorting to other measures to get an advantage over the enemy. I count sneakers as advantage-takers too, as previouly mentioned why.
There is, however, one catch to get me on board the pro-sneaker side, if all players use the whole map and dont neccisarily go head on, but just dogfight with their bombs on (ww1, ww2 and any other war featuring air-power only saw head on passes as a defensive tactic to defend your tail). That way the whole map would be used, and (in my opinion) it would be more fun to bomb, because I personally think head on is pretty boring...
Then it also is more a matter of the hunt (which I personally like more) than of the kill (which I dont mind either...
) to get the enemy, as it used to be in ww1.
So with my point made; happy hunting everyone!