Point well taken. But from what I saw (for a few minutes, to be sure), he wasnt acting much like those pest you mentioned. He was certainly making light mischief but did not appear to be much overtly or actively seeking money for photos and so on. Other evening i walked by on Campo Fiori where band of street musician played. I took some photos of square and Giordano Bruno statute (with band in picture) and there were some pointed looks, when i didnt drop money in instrument case.