Is Odysseus' revenge on the suitors and maids excessive?

In my opinion it was not excessive at all. The maids turned against the queen in his absence, how could he ever trust them again? If he let them go they would surely spread the news of the suitors deaths, which is much too risky. As for the suitors...they were selfish, rude, and greedy. The God's had apparently marked them for death anyway so it was their time.