Chances are the fine for deliberately causing RF interference is more than the fine for causing harmful noise. I looked into this too when I used to share a bus commute with this complete dickhead who thought the bus was a good place to share his taste in music but in my country at least it has some fairly hefty penalities if you're caught and even if you're not, if you don't build it well you might jam emergency communications as well which I'm sure we can all agree is a pretty awful thing to do.