Saw my junkies again today

Same place, same time. This time I called security. I don't care that they were doing drugs, but they seemed to be too flagrant and unconcerned with repercussions. I am concerned that someone could be inadvertently stuck with the needle, or given that they were hanging out in a lonely stairwell, someone could be hurt or robbed by them.

Plus I was annoyed that they were in my way.