He's a sensory ninja who can sense them all from afar. Don't tell me he didnt notice team Gai...
Kishi is making less sense now. I agree its still better going down by rikudou tools than being owned by tnj or the friendship punch.
Okay. So what is he gonna do with the tools? Grab them and carry them with him? He doesnt view the tools as a threat for his plan(which he thinks he will complete shortly).
He also has a huge ego, and only views things in the way of his plan, as threats. I doubt that he would view 3 ninjas without large chakra pools as a threat. He doesnt worry about things that are not threats to his plan. Why would someone who has godly powers worry about spitting some tools away, potentially into enemy hands? Especially when he is about to put everyone into a genjutsu(that would prevent them from useing the tools at all)
I personally dont think the rikudo tools will be the method of madaras defeat. It will be an instrument, but not the method.
I also doubt madara knew team guy was there. He may be something of a sensor, but he was flying to go get his other eye(focused on something else), and as minato clearly showed this chapter, the senseing, is something you must focus on. If you are distracted, you may not sense it.
So while it was certainly plot that guy happened to be where the tools landed, and that madara happened to spit the tools at that time, it was not something illogical or unusual for madara to do.