You really think lack of education and training is the problem?
In most cases yes. The rampant sandbagging some complain about is simply a farce. If it is rampant in your division, then every single one of you are responsible for it and have allowed it to get that way.
I have had "discussions" with every level of player (up to 6) that don't believe just trying to get a good hit after being "stuck" or that "comboing" a player's ball in that is blocking a pocket are defensive shots.
I believe in a vast majority of matches lower level players, those that don't practice and play a lot, are the ones keeping score most of the time and they do not ever mark a defensive shot unless they are told to. They can't recognize when a player is missing on purpose to put themselves in a better position to run out or because they don't want to get down to a forced break out. If I am just watching a game and see someone do something I consider to be defensive, I will tell the score keeper to mark it as such and I will do it loud enough that the other team hears it. I have had players come back with "I didn't defense there!". If they want my explanation why, I will give it to them. I won't argue and still tell our keeper mark it.
We have had nights that the other team has not marked a single defensive on any player when we have 25+ marked on our sheet. Sure it is subjective, but seriously we viewed all the matches that differently?
I won't argue defensive shots, nor will I reduce them if you don't agree with me.