Was chilling with my missus at the bottom of the West End last summer, just sitting on those benches around midnight - 0100ish.
Easily spotted a little dodgy looking pickpocket crew dotted around a few doorways over a junction, looking for easy targets. Body language betrays them and I always pick up on their atmospherics. Usually they way they pass facial expressions back and forth to each other.
We would of told the police, but they were nowhere to be seen (in fact the police seemed very thin on the ground in San An last year)
The pickpockets noticed me blatantly observing them in absolute disgust, and moved away. Not that I would of confronted them or anything, it’s not worth the risk.
I’m always alert for these scumbags.