Fines for mobile phone users in traffic

If you keep your eyes open in traffic in Germany you observe that the use of "Haendys" - mobile or cell phones by drivers although illegal is very common, even while driving in heavy traffic on motorways. This law applies to any driver in charge of any vehicle from a articulated 35 tonne  lorry/truck to a bicycle. However for some reason unknown the law does not apply to pedestrians. I wonder why not. We observed a number of people in Mannheim today texting while crossing quite busy roads. Whether they too are completely aware of their environment is questionable. What this means is that cyclists need to take especial care when cycling on mixed pedestrian/cyclist footpaths.

Mind that pedestrian! They might be using a mobile.