Having recently traveled to Germany, I have to say that while the passing rules are great, the Autobahn experience is not. The frequent drastic speed limit changes (from none to 50kph or even 30kph) as you pass through small rural towns is very annoying and takes a lot of concentration not to enter a town too fast and get an automated photo taken.

Just to clear this up a bit: In Germany you have the Autobahn (the fasted type of roadway, often without speed limit) and the Bundesstraße (speed limit of 100kph, mostly only one lane per direction). The Autobahn never passes through towns or villages, only Bundesstraße and smaller road types do.

As someone else pointed out, the Autobahn doesn't ever go through towns or villages. However, I agree that the frequent drastic speed limit changes on the Bundesstraße are a pain. I am not sure however what a good solution would be. You could lower the speed limit between towns, raise it the towns or build out the road in the city more and keep the limit higher like happens on the 101 when you go through some towns in the central valley. But that has other huge downsides, like being painfully slow or increasing the risks or ruining the towns. Having a town every 1-2 miles might just result in this.