[rajangdavis]

I think it was included because it was consistent across browsers.

There's some weird Rails specific things that I am not too sure make sense (like having the ability to use DELETE as a data method for a hyperlink) but make CRUD apps simple to follow in terms of the Rails way-of-thinking.

I'd have to check the source, but I think it was also used for AJAX forms. I think the safe answer is that Rails is great to create something quick but the built-in helpers aren't always very sane.