That’s the difference: if you are aware that they’re making the transaction to further criminal activity, then you need to worry. You will find gas station owners who were charged: they’re the ones who helped fence stolen property or launder money.
This is why anti-money laundering laws exist in the first place. Criminals would otherwise seek out a bank which doesn’t ask questions and the bankers would be hard to charge unless they were idiots and wrote something like “They are here for crime”. AML removes the ability not to ask or report certain types of activities, which is much easier to prosecute than e.g. proving that a banker should have known there was no legal way for a small Italian restaurant to be so profitable.
And do you think criminals come in and tell crypto exchanges that they are about to commit a crime? AML regulations do not apply to gas stations as they're not "money transmitters", it is that simple. I'm a bit surprised so many on HN don't seem to be aware of that. And luckily they don't, because those laws are immoral, ineffective and costly: https://news.ycombinator.com/item?id=34667051
> And do you think criminals come in and tell crypto exchanges that they are about to commit a crime?
Well, ignoring the fact that they are unlike a gas station in having financial regulations, consider that the disbelief and mockery in this thread might have something to do with a defense based on not knowing that your customers are using you to launder money works much better when you don’t give prosecutors written statements such as "Like come on. They are here for crime." or "we see the bad, but we close 2 eyes." showing that you did in fact have knowledge.
I believe the point was that AML regulations only apply to some categories of businesses and others not, which makes them ineffective. They can be a slight annoyance to criminals but they do not stop them. For money transmission, it is trivial to work around them. And for spending, at a gas station, there's no problem at all.
It is is just all a very costly and ineffective security theater, not to mention the many moral issues that come with it (e.g. billions of law-abiding, unbanked people).