Well, I read through this entire thread and it appears only one other person has had an "encounter" that appeared to be the result of RID. I guess I will make that two of us.
Some months ago I was flying at a large hot air balloon event. There was no TFR and it was held in uncontrolled airspace. The NOTAM was minimal. I flew multiple times over a four-day period. I launched from the other side of a body of water and flew out over the water to get footage. I was always upwind of the field and only flew above the empty body of water, i.e., no boaters, swimmers, etc. beneath me. I was never closer than about 600' horizontally from any balloon. I got some great hyperlapses of ascensions and a bunch of regular stills and video.
One morning I was onsite at 7 am, sent up a drone and saw there was no balloon activity at all at the field. The sunrise ascension had been cancelled it turns out. I was only in the air about three minutes. While I was back in my vehicle packing things away, I heard a drone overhead. I looked up through my windshield and there was what appeared to be a Mavic2Pro sitting directly above me at about 30'. I checked Dronescanner, which I always run just to see if anyone else is in the vicinity (and to make sure my RID is working), and there was nothing other than the residual information about the drone I had just landed. The bogey hovered there for about one minute then flew out of my view. About two minutes later it was back and appeared to start a crude grid search of the area. I never got back out of my vehicle and eventually I left. As I was pulling into traffic on the main road, I again saw the drone. This time it was across the road flying low and slow over a parking lot.
I returned to the event one last time that evening and was airborne for almost two hours with no further sightings, nor did I ever see any other drones on Dronescanner.
I wouldn't call this a confrontation, but clearly I was tracked using RID. There's simply no way someone could have seen my drone from the launch field (I was never closer than 1200'). Also, I had been on the ground for a couple of minutes already when the bogey showed up. If it had been close enough to follow my drone (
Mini3Pro which is super-quiet anyway) I surely would have heard it when outside my vehicle.
It is ironic that someone would use RID to track me with a drone that was not transmitting RID itself.
I have long followed the practice of keeping a low profile when flying, so this was a real surprise for me.