In answer to, how often this happens, to me, pretty much too many times to count scrolling in console view, enough that it is somewhat annoying to have to readjust parameter if noticed immediately, more so if much later, and if having to revert to previous mix scene(s) or project files to check levels, then back to current one and readjust parameters.
Perhaps for scrolling thing, if you could say hold "ctrl" or "S" or other key, to turn mouse wheel to allow scrolling only, regardless of where mouse is hovering may be more simple thing to implement, than a track/parameter lock feature?