Can I completely turn off the fans on a MacBook Pro (0 RPM) I would like to know if there is a utility to completely turn off the fans. 

Currently, when completely idle, fans are showing 2000 and 2100 RPM.
Although this is probably not recommended, I would like to have the option to completely shut them down.

Software such as 1 enable fan control but only lets you lower the RPM to the minimum set by Apple (which is 2000 and 2100 for each fan respectively),but I’m looking for an off switch. 

When the CPU is idling, this should help preserve some battery life, and prevent dust from accumulating.

I am fully aware that this can damage the system and am not recommending this to anyone.

The question is whether this could be done and not whether this should be done.
Disabling the fans is not recommended but appears possible through the software below:


  smc-command
  
  This tool will allow you to write values to the SMC which could irreversably damage your computer.
  
  ...
  
  This program will allow you to read and write values to the SMC using the AppleSMC kernel
  extension.  The purpose of this is to show how to talk to the controller.


smcFanControl is a graphical interface for sic-command with additional safely limits:


  smcFanControl
  
  smcFanControl lets the user set a minimum speed for built-in fans. It allows you to increase your minimum fan speed to make your Intel Mac run cooler. In order to not damage your machine, smcFanControl does not let you set a minimum speed to a value below Apple's defaults.


Being open source, you could remove the minimum limits imposed by smcFanControl.