Casinos isn't doing this because they want to. They are doing this because they NEED to. Casinos is a business. They don't want to piss of their customers with all this shit if they didn't felt forced to by the regulator.
As I understand it, they are not 'forced' by the regulator. They need to demonstrate 'due dilligence' to satisfy their obligations and that is it. Due dilligence involves using a basic risk assessment strategy and using information that they already have to make a decision over whether someone appears to be a high risk.
People who are not a high risk-
1) People who already have limits placed on their accounts of their own volition- they are making use of the RG tools available to them which are provided by the casino.
2) People who are using previous withdrawals to fund their further gambling sessions with little input of fresh funds. This is easily spotted by the casino.
3) People who pop the odd £50 in here and there.
Warning signs-
1) Repeated deposits in small amounts of time
2) Repeated reverse withdrawals
3) Large sums of money being deposited
4) A lot of time being spent in the casino per week
See- it really isn't difficult.
The bottom line is that casinos will only be fined if there was a
clear and obvious failing on their behalf. They will not be fined in all scenarios. The clear and obvious failing would be related to any of the warning signs I've listed above. The reason why some casinos are operating a blanket policy rather than a case by case one is for little more reason than to not hurt their bottom line. All down to profit, once again. Case by case = more staff time used monitoring accounts.
The issue is that in the long run, the blanket approach will dent their profits much much more.