They are pretty easy to catch out and if the service communicates with your bank
Bank secrecy laws should prevent that.
I mean, isn't it usual that KYC is always associated with any money transactions much especially to fiat transactions involving banks?
Legacy banking institutions are usually laxer on KYC compared with some cryptocurrency services.
Of course, it makes absolutely zero sense to try to pass fake info or dox if you want to send or withdraw fiat money to your bank account registered in your name.
Indeed, the exchanger will allow deposit and withdrawing if your KYC profile and bank account registered in the same name, there is no shortcut in this matter regarding fiat currencies due to AML policy. It's better to buy bitcoin from someone trusted here, there must be some people who willing to do that. But only with a trusted person.