Seems like the most logical step to take, right ? You are a group of thieves and are planning to steal money / need some money. Well, there is this machine that is dispensing cash to everybody, so it must contain a lot of money. Now, how to take the money ? It is not so easy to break into an ATM machine since it contains a number of security safeguards, and there would be people nearby (because of which you cannot take the amount of time you would require to break into the machine). Further, because of security issues, or even because of thieves forcing people to withdraw money at gun-point, ATM's now come equipped with CCTV cameras. This makes thieving a bit difficult. The solution ? Take the entire ATM with you, and then you can open the ATM at your own time, and the company has no way to find out where you have gone (link to article):
A shopkeeper noticed that the machine inside the ATM cabinet was missing and immediately informed the police. The police said the thieves had first blocked the view of the camera fitted at the entrance of the ATM booth with a flex board and then decamped with the cash machine containing Rs. 7.6 lakh. This happened just a day after a similar attempt-to-break-in occurred at the ATM centre on Jangali Maharaj Road. The thieves there were, however, unsuccessful. The Dehu road police said the incident took place in the wee hours yesterday. The burglars were successful in their handiwork because the machine was not fixed properly to the floor.