So the Q&A will stop bots, but a human is going to Google that question and in a matter of moments, they will be in.
One other consideration is difference in spelling from art to art for the same techniques. For instance, the Judo throw Harai Goshi can be spelled Haraigoshi, Harai goshi, harai goshi. I've even seen Harai-Goshi. If the answer is case sensitive, is or is not a single word, hyphenated or not. I am sure that others here can come up with even better examples.
Still, the Q&A is a great first layer of defense.