The Probe will protect us!!! :lol:
Seriously though, probes aren't a risk. Radio signals are.
But even that isn't much of a risk in my opinion because we've only been sending our radio signals out for 60 years or so, and you have to keep in mind that radiation falls off with inverse r^3, which means that you really need to be listening to pick *anything* up at 60 light year distance. Our antennas from 60 years back weren't really powerful in the first place.
Keep in mind, when Russia first launched it's probe to the Moon, there was only 1 deep space antenna that was sensitive enough for the signal to be picked up. And that was just this short distance to the Moon.
Granted, we now have antennae that can pick up something like a millionth of a billionth of watt... but we're listening specifically in a certain region for a long period of time.
I'm not sure if radio signals get blocked even a bit by interstellar gas, but if they do, even less of a chance that someone can pick us up.
Which brings me to the last point... if there really is a warlike civilization out there, that probably means it's not alone. And if it's not alone, it might just be locked in the middle of a large conflict. I seriously doubt they would want to investigate us or any other undeveloped civilization like us
Really nice debate though