Counterproductive

Some people just write so well. Check out Ebert's review of the new movie Troy:

The movie recounts the legend of the Trojan War, as the fortress city is attacked by a Greek army led by Menelaus of Sparta and Agamemnon of Mycenae. The war has become necessary because of the lust of the young Trojan prince named Paris (Orlando Bloom), who while during a peace mission to Sparta, seduces the city-state's queen, Helen (Diane Kruger).

This action understandably annoys Helen's husband, Menelaus (Brendan Gleeson), not to mention Paris' brother Hector (Eric Bana), who points out, quite correctly, that when you visit a king on a peace mission, it is counterproductive to leave with his wife.