They were talking. I thought it would be ok to stand still for a moment as my angle might not compliment the actual situation.
It didn’t paid off. They noticed me. I put down the camera, smile and say hi as a sign of respect. But it was so pathetic I assume it was an instant apology. They smiled back, and say hi. It’s a cue for me to nod and walk away.
It’s a normal thing to do. I prefer to interact with the subject, rather than making a long face when caught red handed and walk away like nothing happens. It’s just rude. You could just say goodbye to this genre if you keep thinking “doesn’t matter. Its just a picture”