It's getting worse every day. I've been to places with lots of panhandlers, but none as relentless and abusive as the ones here in Buenos Aires. Before they used to just ask a few times for money or if I would buy something from them, then leave me and whoever I was with alone. Now, after having been mugged a few times, I know that some really won't take "no" for an answer. I've had some physically badger me and even follow me for two blocks, shouting at me to get my attention. In most cities I've lived in the protocol would be to just ignore and not indulge them. This apparently doesn't work here. Any tips on avoiding or getting out of these situations?