it may not be illegal, if it is a motor bike then the answer is yes it is illegal. if its a bicycle then i would say no, but either way it is not a SMART,RESPONSIBLE OR SAFE THING TO DO.
depends on the bike and the brakes. Go to www.parktool.com or www.sheldonbrown.com for more.
Disc brakes and drum brakes.
if your bike is a u, v or disk brake the cable is probably to tight or if you have hydraulic brakes of any kind your brakes will do this you just have to deal with it
any bike store
Mechanical disc brakes.
Yes
Brakes are designed to stop things from moving, therefore making it difficult to move a bike that has its brakes on.
No. Anything that is not human powered, or in other words has a motor, is illegal to operate upon a sidewalk.
THe brakes rarely need to stop. But the brakes can be used to make the bike stop.
Yes
most bmx bikes dont have front brakes now ans if you pedal backward and it has pedal brakes its not a bmx bike