Germans are notorious tailgaters even at 140mph. If you're in the left lane in an unlimited zone and you aren't doing more than the guy behind you, expect to get the headlight flash (oh hi Mr. Porsche @ 190mph!). Motorcyclists split lanes even when traffic is flowing at 60mph. The police here just don't have the kind of manpower required to regulate drivers like you imply. Lots of speed cameras (fixed and temporary) though!