I have always been under the impression, perhaps because in the past cities have called foul when it has happened and zappings have occured in the past, that it is not acceptable for someone, under the pacifist mantle to go and raid the fields of another city.
My personal opinion is pacifism should not be used for a hostile act and field raiding pretty much falls into that catagory. Mojo, I do not have any idea why you have chosen pacifism but it strikes me it is not from a heart felt desire to be pacifist in nature but to allow you the opportunity to undertake rip off acts with some level of immunity.
You devalue what the majority of pacifists stand for.
Written by my hand on the 1st of Hindyear, in the year 1147.