1. Don't be there.
2. Be a Defender Titan and perfectly time the deployment of your WoD to suppress it.
3. Be a Nightstalker Hunter and shut it down that way.
4. If 1-3 aren't options, take satisfaction that if you are a victim of Fist of Panic....you took a potential multi-kill off the board....and its a net-plus for you team. Even if its a death on your personal stats.
So I see it as something of a moral victory if I pressure a Striker Titan hard enough to provoke him to waste his super on a single kill of someone who isn't using their super.