It would be plain stupid to remove the converter. The converter is designed into the engine controls of the vehicle. Removing it wouldn't really increase power because they have very little backpressure. If you want to remove it because its plugged or bad then you could do so but the check engine light would come on and it would never pass a smog test. It won't physically hurt the engine to remove it. Removing the converter is against the law. I would have an aftermarket converter welded in to replace your old one if its bad.
Check engine light will come on due to bad readings from oxygen sensor after cat
It is illegal to remove a catalytic converter from any road vehicle.
Vehicle will run -however illegal to do so.
You lose power, engine can't breathe.
the gases are converted to less harmful gases as nox to no2
It may or may not have damaged the converter. Remove the water and then you will see. More than likely it will be fine.
Depends on why it is noisy.
If 1996 or later it will turn the check engine light on.
You will risk doing damage to the catalytic converter(s).
Check engine light will probably come on and you will fail the emission tests.
The check engine light will illuminate and you will fail an emissions test.
I'd assume too much soot would build up and the truck would not start.