I was out flying yesterday, I saw another guy on the walk way and he was flying a 3DR solo, I stayed back about 50 meteres and all times I was flying around I could see where mine was and knew pretty much where his was. He told me after he packed up and was walking past what I was doing flying in the same air space? I should know better that when the air space is in use. (there is no airports and restricted zones where I was flying - he was in the same place) I believe what he means is flying in the same air space as him. (I was lost for words). He then said don't you know the rules? As far as I know its 400 feet, and don't fly in commercial aircraft areas. He then said its you guys with the "white drones" that give us a bad name. There was no collisions or near misses and I purposely flew away and around him and away from his drone so we didn't come close - I could see mine in the sky and could see his. He also said im not even 100 meters away from him (correct I wasn't but, I wasn't on top of him either, I was about 50-70 meters away.) I thought other drone pilots are usually friendly, seems like the people with 3DR solos are different. Iv never had such a rude person, everyone usually wants to help everyone else and discuss their flying experience. Luckily I didn't go and say hi. Is there such a requirement that if another drone is flying you shouldn't be? or was he just being precious?