By deduction, we can conclude Jagex (clearly) don't ban accounts according to a concept of 'how confused' they are when it comes to sending 'fake objects' - not only would it be 1000 times harder to measure 'confusion' than detect interactions with a fake object, it would be inferior evidence of botting... acting retarded (whatever that entails) doesn't mean someone is a bot, but interacting with a fake object (only a bot could see) is.
On this basis, doing the same thing to a bot operating on vision is impossible. Sure you can detect when a RS account is interacting with misleading things drawn on-screen, but that isn't proof of a bot.
But lets ignore that flaw, and assume Jagex would consider drawing misleading graphical cues on-screen for a new detection system that picks up how 'confused' an account is. Your suggestion would still be false, it's clearly (far) more difficult, and costly, to "confuse" color bots.
Drawing misleading visual cues, harms gameplay and graphics - sending fake data has barely any effect on gameplay and graphics.
You can send fake objects of every kind to a reflection bot, by inheriting a few lines of code - doing the same to a bot operating on vision requires significant research + development, multiplied by the number of objects; we're talking exponentially more difficult. There are infinite ways to extract information from graphics, so it's very hard to understand how a color bot's 'vision' works and confuse it. With RiD it's not just colors, it's about shape, size, movement, etc. Furthermore, every single object looks different, and is read using a different procedure. Confusing RiD would require a specific screen-reading method to be reverse engineered and understood first, and then some weird stuff to be developed (such as large moving objects being randomly drawn) - whereas sending fake data to a reflection bot, requires no great research, and is a one-size-fits-all solution.
It would have a short lifespan, because graphical interference would not go un-noticed - fake objects are disguised completely from regular players, and are easier to hide from botmakers/scripters.
It would be a PR disaster. Because you couldn't hide misleading graphical cues from players, Jagex would have to come out and explain why they are there, and that still wouldn't stop the flood of bug reports they'd get.
There's a good reason Jagex have never used this as a detection process. Whereas detection systems aimed at bots which take cues from data are in operation now.