When I was in San Francisco, I had a homeless man with one eye (the empty eye socket actively oozing) come up to me unprovoked (quite literally unprovoked, I was just on a walk and not interacting with anybody at all), get within 2 centimeters of my face, and scream at the top of his lungs "I WILL MURDER YOU". He then walked away and nothing else of note happened (aside from me spending the rest of the evening with my pulse at 140).

Suffice to say, I don't think it's fair to categorize me as a Karen for asserting that San Francisco has a large number of problematic homeless people. I could give about 8 other stories (from SF, Boston, NYC, and Chicago) that happened to me, two of which (both SF) include grown men dropping their pants, exposing their genitals, and visibly pooping on public streets where children were present, with no attempt to obtain any degree of privacy.

These aren't stories from my friends, these are things that I personally witnessed and experienced. These aren't 'oh that guy is ugly and smelly' stories, these are 'if I did that myself I would be arrested' stories.