I think I can answer this - let's test my understanding:
Yes, there is a risk of the continuity check, an electronic failure, or LCO failure launching the rocket. This is mitigated by:
1) the rocket is supposed to be on the guide, PEU before connecting to the launch system. (I'm told that's a real pet concern of our local prefect.)
2) SOP is to short the leads, looking for signs of energy, before connecting.
3) it's away from the the prep, parking, spectator, and RSO sites.
4) the number of people at the pad is -supposed- to be the minimum to accomplish the task.