As most of us know, there is a grace period for users who started to write an answer and the question got closed. This grace period is set to 4 hours server-side. In the web interface though sending an answer is blocked when a question got closed. This will prevent to click the button, but can be easily circumvented by a browser code fix.
I wonder how often answers are posted after the question gets closed. Of course, we have to consider not every user games the system, and I am not after that nor do I want to point the finger at users. It might help though in the analysis on the problems with rep farmers.
Can anyone check the database on these facts?