We're having this internal debate where some people think that the user shouldn't use the browser's "back" button when filling a multi-page form (for security reasons), and that the whoever hits the "back" button should be forced to start over.
I'm not really sure about this. I mean I understand the security concerns, but I also usually hate to take over the default behavior of browser controls. It's still a valid point of view though.
What do you think? should the user be able to go back to previous form pages using the browser's back button? and why?