OKAY, I've re-done the system with a secure form, and re-posted to this thread: http://news.ycombinator.com/item?id=3779070

The new form is at https://docs.google.com/a/foomojo.com/spreadsheet/viewform?f...

and the results will be non-editable at https://docs.google.com/spreadsheet/ccc?key=0Aj6s1BtH3XlsdGZ...