“Like other major banks, BOA has relationships with other banks that would accept withdrawals from ATMs.”
CIRRUS is ubiquitous at ATMs all around the globe, including virtually all American banks. Theoretically if you deposit to an account in Chicago, your friend or relative in Jakarta can withdraw cash from any CIRRUS machine using the ATM card for that account.
The only hitches are that (a) many regional banks in the U.S. don’t allow automatic ATM withdrawls from overseas, you’ll probably have to call them to insist they enable overseas use, and (b) even multinationals like Citibank will flag your account if they observe abberant use, but you can inform their security department to ignore “X” type of transaction.
In any case, the banks keep a fairly close eye on international transactions including ATM use abroad.
Regional banks will be more likely to prohibit that kind of activity yes. The challenge is that the larger banks choose to acquire smaller ones to “grow” their business, and the list is becoming smaller and smaller.
Some financial institutions do keep a close eye.