If you install fully shielded resistors it can work, but shorting the antenna completely will have the added benefit of destroying the RF amplifier transistors. From then on the car will just think it’s out of cell range, and there’s not much chance of leaky signal. It’s not too hard to make shielded loads though.

I do prefer the option of removing the entire cellular module though.

Any non-disable-able connectivity will be an absolute deal breaker for me on any vehicle I own. I guess that probably means I’ll be buying used vehicles for the rest of my life, but it is what it is.