[Christ]

Not sure where you got that from, honestly.

Cutting ANY hole in the bumper represents a collusion to the coanda effect. It WILL increase air turbulence more than a smooth transition from one point to another, and create vortices at the edges of the hole. That's not a point that can be argued.

Also not to be argued is that cutting holes in the bumper will not produce any effect at all. It will lessen another effect, which is where you're apparently confusing terminology.

I agree with you that cutting the entirety of the parachute portion of the bumper cover is the best option, short of cutting and smoothing the transition. I never said differently, that I recall.

Those points made (again), I still don't see the relevance of your tirade.