Agree nothing is idiot proof. If the knock map is tuned conservatively no doubt you will feel the power be sucked out of the car so probably a little better than a flashing light. The other concern would be if its too conservative egt's will skyrocket if you keep stuck in to it.
The rb26 pfc ecu has inlet air temp correction, 20x20 fuel/ign maps (finer tune) vs 16x16 on the std ecu.. another couple of plus but for an additional price.
If I could get the ecu remapped for $500-600 and then further tunes for a few hundred I'd jump at it.