If a country is storing turns while being relatively landfat to attract hits for dr abuse, then a penalty should be imposed when he uses all turns at once and jumps while grabbing big countries (no penalties for explores). Penalties could range from reduced defense for x hours, increase in upkeep costs, diminished land gained in subsequent grabs, or 80% chance of earthquakes (ha!).


Or when a country is in deep DR and grabs much larger countries, his DR instantly returns to 0 or there are huge DR deductions per hit (not just 1) depending on the land acquired on the hit relative to his original size.

Or as izapimp suggested, why not make it so retaling within 24hrs of the grab will bypass any DR on the target.