It is most definately dangerous.
yes, i live there and its very dangerous you should get it fixed
It's most likely your lower Trailing Arm bushings that are severely damaged. It can also be the upper Trailing Arm bushings. Grab the arm and see if you can twist it. If so, it needs to be changed. You can get polyurethane bushings from 4x4parts.com or you can buy the entire arms from parts.com. I changed just my lower with polyurethane and the rocking stopped. I still need to replace the upper but I didn't like the dealer price ($600) and, like i said, my rocking stopped.
It is not safe to drive a Ford Expedition with a broken lower trailing bar because it can snap the drive-shaft mount.
Driving a shaking car is very dangerous but it could be the ball joints,tie rod ends sway bar bushings, CV axles or unbalanced tires.
I assume you mean a cracked rim, if so then DO NOT drive on this. It can lead to catastrophic failure and cause an accident.
not where i live
You can drive a car with a cracked engine block, but it will eventually stop running. The engine will go out completely after time.
Had mine lubed and they said it was bushings.
Sure if you are looking to have an accident.
Yes
yes
yes