I see what you mean about the payment page but it must be harder than that to nick money from my bank account ie i picked up 7 cheques yesterday so now i know bank details and address of 7 people how many over i month not sure but a lot. Finding there date of birth i am sure is easy ie birthday cards in window etc. anyway i will contact bank tomorrow because you made think ty. 
Yes but you'd be easily traced. Them handing you the cheque would put you at the top of the list of people who had that information.
However putting a link to a webite with your bank details from a website which displays your date of birth (although I notice you sorted that) is, how shall I put this, not a great idea.
It would be very very difficult to trace the people who
already have the information to take out a loan in your name.