system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] What's stopping a madman from destroying a city by shooting into someone's personal shield?

Wouldn't terrorist be more dangerous than ever? If everyone that is a soldier is armed with a shield and shooting it causes mass destruction.
gpt
This is obviously a huge plot hole, but, i will try to provide a few in-universe explanations.

1. Use of atomics is a big taboo (including lasgun/shield combo) and the whole Landsraad would vaporize anyone even remotely responsible and their planet with them.
2. Lasguns are expensive to build and maintain so only major houses could afford them and they could be traced back to them.
3. Aside from major houses, only Fremen have a few old lasguns and not even they are so insane to use them against shields.
4. Lasgun/shield interaction is too unpredictable and inconsistent to be used effectively.