First, I think that using mailto action is not a good idea. It makes necessary that the browser supports this protocol. What about the people who don't use integrated browser/mail packages, and whose browser is not correctly configured?
What I would like more is a confirmation mail that has to be replied to in order to make the web submission valid. Btw, at the moment everyone can spam the DBS with invalid addresses, can't they? Well, shouldn't this bug maybe reassigned to bugs.debian.org? -- "We're going to have the best educated American people in the world." - Governor George W. Bush, 9/21/97