As stupid as this sounds, eventually someone is going to suggest letting grocery stores be open on Sunday and this will usher in what German historians call "Der Modern Age". There will be a domino effect... Rathaus will get Internet, Doctors will forgo fax for email and Aldi will finally bring Trader Joe's to the motherland. We will slowly creep into the 21st century. One pointless rule at a time.
This stupid speed limit thing will be remembered as the catalyst of progress in the race to catch up to their neighbors.
( /s Because Germany hates change )
Queue up the: "I'm entitled to a peaceful Sunday" folks.