Hey, I just counted the games on the front page of the Multiplayer forum where people have rules against MoD or battlefield spells. That was 7 out of 37, which is around 19% of the games being played. The actual number of people in the community may be even lower considering that DomIII players are often willing to make concessions in order to get a game going.
If you want to start citing "unwritten rules" and anecdotal evidence as valid evidence, then you've abandoned the rules of logic, rules of evidence, and the scientific method and I can only say: good luck with that!
My point: there is a very outspoken minority that does not represent the community despite their belief that they do. This is not elementary school, so the loudest person is not the most correct.
Considering the number of people who seem exhausted by this argument, I assume that most people would rather play their own way rather than argue. Considering the number of games that don't address the issue in any way, the "pro-MoD/battlefield spells" majority are simply ignoring this debate and playing their games as they please.