My answers below Riggers, grouped in a readable order.
All silly (or mostly silly):
Identity documents must be carried by everyone over 8 years of age at all times.
In flats, it is prohibited by German Law, to hang washing which shows above the flat balcony level.
In Germany, Sundays and Public Holidays are treated as days of rest and you are not permitted to Hang laundry on outside lines, clean windows, clean outside areas, mow lawns, clean or do maintenance on cars.
In Line and Roller Skates / Skate Boards:
No removal of bushes, trees or flowers allowed. Climbing trees is not allowed. No games involving throwing an object eg 'Frisbees' (see Children's Play Area). No public furniture to be removed e.g. park benches, ornaments etc. No begging. Being drunk or conducting oneself in a noisy manner is prohibited.
Bathing in ponds, rivers and canals is prohibited unless a notice has been erected by the local authorities stating that bathing is permitted.
I can tell you from my own personal experience that this is ignored
Mixed feelings:
Washing of Cars:
Seems silly but apparently there is a waste chemical issue.
Pavements:
Snow:
I’ve help some German friends do just that.
Garden Rubbish:
They like to compost and packaging is almost totally recyclable so it’s not so much an issue for them
Parking:
Not sure about that one.
Barbecue cooking or grilling is not permitted on the balconies of flats.
I didn’t know that anyone did that over here anyway, so it seems redundant.
All good:
Children's Play Areas:
Children - Bicycles:
Noise:
Car Noise:
All vehicles must be registered if parked on Public Roads or in a Public Vehicle Park.
In Germany, parents are generally held responsible for the misconduct of their children.
The best! This is partly why this country is failing.