Maybe I'm not the right person to be answering this question, and usual Rule Zero caveats apply, but no - no it can't. Pretty much the only reactive things in the rules are enchanted items. You can't do a reactive block with a gun, you can't do it with Evocation, and you can't do it with Incite Emotion.
You could, however, use Incite Emotion as a way to concede the social conflict by escalating into an unwise mental one instead...