Here's one example: NAB, an Australian bank just issued an statement saying that it will block transactions going to some exchanges.
From 18 July 2023, we are introducing new customer protections by declining some transactions made to high-risk cryptocurrency exchanges.
They are not only flagging this as a suspicious transaction, they are actually blocking your ability to transfer your own money to an exchange you want to use. There's no way for you to white list the transaction:
If you still want to make a payment to this cryptocurrency exchange, you’ll need to contact them to see what alternative methods of payment are available.
I can understand that they might want to flag some of these transactions to help prevent scams, but they've decided to completely remove your ability to spend your own money however you want to.
This is probably the first step in paving the way to implementing CBDCs.