My bank's two-factor authentication system lets the user select the communications method before logging in, so I set my phone number to a 555 exchange, making

My bank's two-factor authentication system lets the user select the communications method before logging in, so I set my phone number to a 555 exchange, making it invalid, and it hasn't cause any trouble. A teller did once notice it, but agreed it was a good idea. There's no way the legal system could require a phone number, because the government overplays their support for the homeless, and being able to work with people that don't have phone numbers is a big part of that.