Major Mishap said:
Don't think a Pass Acivation is the way to go, I certainly wouldn't be pleased if I were disadvantaged just because I was winning a game. Also the balance would swing in favour to the guy with the high cost units. Best bet is just not to play with a guy who cheeses out his army with spotters if you don't like it or agree to restrictions like 1 spotter be artillery piece and no artillery, no spotters.
i was thinking the same thing about the 1 spotter per artillery, but was thinking 2 per artillery.