I witnessed the whole farming issue on W92 . However, there is surely another way to fix the problem. Like the Diminishing return rule. If same alliance kills same base within 7 days, use a diminishing return along the lines of 1st-100%, 2nd-75%, 3rd-50% 4th-25%. Any other kills after 4th yields 0% within 7days of LAST kill.
It would also allow the developers to observe any patterns of abuse and implement appropriate sanctions.
At least consider something besides a blanket punishment for fighting wars.