form dropdown - live html edit

Hi,

Thanks to tools like firebug all visitors can edit HTML code of web page online. So it lets us edit select option values. When using form generator at typolight user can still insert whatever data they want and post it. I think all list elements (select, checkboxes, etc.) should check if provided data is on my list.

I'm used to Zend Framework where there is such options (by default) so I guess it would be nice feature here as well. It could send message like "incorrect data provided" or something.

Thanks.