Quick question, why do you need to do this?
Anyway, I suggest Murgee random autoclicker (set a random time, and it will click between that given time), can be used in rs/osb client ofc.
I doubt it will get you banned, but I guess that's your risk
You could try something that randomly rotates your camera. If you just hold down the rotation there is a system that stops it eventually, but going left and right randomly would work well.