Do you really think that removing one type of movement control will actually make it so bots will never ever come back? It's just one movement control type. Devs who chose to use CTM did it for efficiency. If that gets taken away, they go back to good old key emulation. How much time will that take to code in? I'd say probably the same time it takes them when a major patch comes out.
So aside from making legit users mad, it will accomplish absolutely nothing. Everything will be back at square one.
How about removing arrow-based, or WASD movement? Or movement itself, for that matter. After all, bots move, don't they? If we prevent them from moving, we'll kill them, right?
I know, that line of reasoning is awfully stupid. Yet it's the very same line of reasoning your suggestion uses.