I always found people who take pictures with the middle finger as a trashy gesture. I don’t and never know who they’re trying to tell off but it’s out of no where and just stupid. It doesn’t offend me, I just find it a pointless gesture and therefore - trashy.
I was standing outside of a coffee shop one time when I looked across the street and I saw a 40-year-old grown adult woman take her gum out of her mouth and deliberately drop it in the middle of the sidewalk because she couldn’t be bothered to walk five feet to put it in a trash can.
It’s gross, but if you’ve got a napkin nearby, you’ve got the opportunity to provide some instant karma in the form of social shaming.