The car will then be unable to start.
no you cannot kill your alternator by switching your battery from one car to another
You can short out a battery and destroy it in a few seconds.
No
Yes
Yes it can. Especially if the battery has a low charge to begin with or it is an old battery.
no, it will kill the cells if get in it
NO! They use a car battery and jumper cables to torture people.
it will arch out and melt the knobs on your battery and your cables
Nothing. The battery is sealed an no harm will be done.
Anything left plugged in and powered up can drain the battery.
THE BATTERY WILL GO DEAD
they have to be recycled and they wont work.