Thought I had to attack his node for that, not his icon?
I could trace, then spoof his node to shut down or attack & crash it, would be nasty on him, but the trace is a threshold 10 + stealth, so will take some passes.
I'm thinking it'd be faster to chase him away from GridGuide so he's got only my comm to attack, then when he's in there, jam to disconnect and he has to start over hacking my firewall, hopefully buying me some time to do something useful with my car.