[support] Simple form-based node flagging

I would like to make a simple "node flagging" tool on my site. I have a flag icon on every node which has the URL of the node (or the nid) inserted into it using php.

What I would like is for a user who clicks that to be sent to the contact form and for the page URL to appear in the "Message" text box already.

I've had a lot of problems with the Abuse module (especially the admin side of things...constant sql errors), so have decided to try to create something simpler. If the contact form can't be used like that, is there a way I can set up a simple form on a page (mysite.com/report) which is pre-filled with a flagged node's URL/nid as described above?

Thanks

Neil