Killable using Particles?

Hi,

is it possible (and if so how to i go about it) to apply a killable script to a particle system (in my case a "flame thrower")? 

I can get it to work by surrounding the particle system with a box collider and adding a rigidbody but is there a way to use the OnParticleCollision to trigger the damage functions instead?  or would there be negative reasons to do it this way?

thanks.