Capetonian,
To be honest, a more productive use of your time would be to spend the time reporting the spammer to (a) the people hosting the account sending the spam (b) the people hosting the account receiving replies (c) the people hosting the phishing sites.
Spending time reporting, and actively following up on said reports would be a much better use of your time, and much better for the good of the internet than pointlessly filling in forms with false data.