I can see one flaw in your plan.
5 icons running silently just standing still.
If a spider finds more that 1 icon running silently in the same area not doing anything, the alarm is going to get activated.
Not positive if a Probe IC would activate the alarm for that.
Also of note, if any decker checks for the history of one of your blanks, and comes up nothing.
Yeah, the alarm's going to get activated.
Finally, unless you are at a safehouse, you need to have something broadcasting a SIN.