Slider Control Lock --

Having unknowingly moved a control slider more than once over the last few years, would it be possible to add a lock and perhaps a color change to the slider controls when locked? 
A right click (or something) to lock it and have the slider change color would be nice. 
Or, a small button at the end of the slider range to lock and unlock? 
Or, a way to hide the control and leave the the metering visible when locked or not available to "adjust." 
If the controls are out of sight on the task bar, then the metering is also not available to monitor.