Most of the graffiti I see is on bridges over the freeway. This is distracting while driving, especially because freeway signs are also hung in that same place,

Most of the graffiti I see is on bridges over the freeway. This is distracting while driving, especially because freeway signs are also hung in that same place, so I look up there for relevant information and instead am distracted by various phrases that I don't understand. Often there's even graffiti on the freeway signs, sometimes covering up the text, making it unreadable. Yes, billboards have some similar problems, but that's somewhat mitigated because those are on the side of the road, not directly above it. But you're right, certainly not as bad as a bank robbery.