I can't think of a single worse signal jamming activity than interfering with civilian aircraft frequencies. No, it won't make a plane drop out of the sky immed

I can't think of a single worse signal jamming activity than interfering with civilian aircraft frequencies. No, it won't make a plane drop out of the sky immediately, but imagine an extremely busy airport like Heathrow without access to ATC. Then imagine one of those planes has an emergency. It means that ground crews won't be ready. It means that runways might not be cleared. Weather conditions might not be conveyed. So much can go wrong so quickly. Communications authorities are right to apply heavy penalties for signal jamming.