I see them all the time on I95..NH, MA, Everette Turnpike, NH and on down to NJ.
I think they are interesting.
As far as distracting people, well I don't see how these signs can be any worse than the following activities I've witnessed in cars:
The people who are on their cell phones, weaving in and out of traffic because they are LATE (probably due to a Duncun Donuts line) while shaving/putting on makeup and eating said donut, carefully balancing the liabellous cup of boiling, hot coffee on the dashboard as they watch the 115th replay of Little Mermaid on the "on board" TV, while supervising a fight between two kids who are also tired of the 115 replay of Little Mermaid...ooppps brake lights ahead, 4 lanes to 1 due to bridge painting or road paving.....
Hey.....What did that sign with all the cups say?????