This really should be published in Lonely Planet and other relevant guides under the scam section as after spending the evening overlooking the street I saw it happen at least 5 times in 2 hours.
Basically you are approached on the road just after pub street by a young child holding a baby and an empty bottle, the line is usually something like "I dont want Money I just want milk for the baby" you will be harassed about 10-20 metres and the young girl will keep shouting the same thing.
At this point, if you agree then the young girl will guide you across the road to the mini mart which sits under X bar.
The Milk formula which the girl claims she needs for the baby is unpriced (The only item in the shop with no price), and then when you take it to the till it costs anywhere between $10-$25.
At this point the person being scammed feels pressured into completing the purchase and the Milk is bought and handed to the young Girl.
The Tourist then goes on there way thinking that they have helped a poor baby who has no Milk, the reality is very different.
Once the tourist is out of site the child returns back to the shop and returns the formula and in returns receives 50% back.
This means that assuming the milk costs $10 then the child is making $5 every time one of these tourists falls for the scam.
Given that in a 2 hour period I witnessed 5 tourists fall for this, the girl is pocketing at least $25 a day, probably more like $50-$60,
when you keep ion mind the average wage in Cambodia is $2 a day then you can see how astounding this really is.
Having watched this over a two hour period whilst sitting at the top of Molly Mallones and eventually making me curious enough to follow the girl and an unsuspecting tourist into the shop, I witnessed the whole scam start to finish first hand.
Searching the net I can see this has been bought up countless times over the past few years but obviously no one has put a stop to it.
Its a shame witnessing things like this, as a tourist it makes you not want to trust anyone and creates an immediate barrier of distrust and the fact this is so well known yet the authorities obviously turn a blind eye makes you think twice about making a return visit.