Could be useful for proof-of-concepts. Though, if you are a site-owner and your form can be submitted with this, you should probably consider implementing anti-csrf protections.
That was exactly what I was thinking, you don't even need to create an account or anything it seems.
But without the cookies.
Good point.
> This service works by providing a hidden form that is built on page-load and uses javascript to 'click' the form submission. This means cookies will work correctly for the site you've submitted to, but you need to have a javascript enabled browser to use the service.