I have just returned from a three day trip in San Francisco. I had previously visited 4 years ago and was surprised in the increased number of people begging, who appear to be under the influence. I accept it is a issue in all large cities around the world, however it was a constant issue throughout the day in every area. We stopped the south west side of Market Street where it was more prevalent to the point where they seem to roam in groups and it is an intimidating environment to the point in the evening we travelled by taxi, where previously I would have used the tram and walked. It seemed less of a issues towards the Piers and China town. San Francisco is one of my favourite US cities, and I was planning to take my family, however I would now consider where I stopped.