Okay, right. So the host would typically be running a Patrol IC program all the time, which can make Matrix Perception checks to try to spot me. If it does spot me, the host immediately does as well, and can start running other, nastier IC programs.
But me making Matrix Perception checks doesn't have a risk of alerting the system, outside unusual circumstances, except that it takes time and thus could expose me to more opportunities for the Patrol IC to get lucky and spot me.
But me making Matrix Perception checks doesn't have a risk of alerting the system, outside unusual circumstances, except that it takes time and thus could expose me to more opportunities for the Patrol IC to get lucky and spot me.
