Procedural
Not at all.
I'm riding a bicycle.
Anyone driving a vehicle or riding a bicycle should obey a traffic light.
Yes, it is possible to imagine a bear riding a bicycle.
yes. a bike is a vehicle, and also while riding a horse, or driving a wagon.
If they're riding the bicycle, particulary in traffic - yes. Taking the hands off the bars while riding is as bad as taking the hands off the steering wheel while driving a car.
you will be riding a bicycle
Yes, because you don't inherit the skill of riding a bicycle.
I am not riding
A bicycle
yes you can get a DUI for driving any motorized vehicle
That's all down to how hard you're riding. Most people will use more effort when riding IRL than riding stationary bikes.