>>12
Afraid of what? Automatic bans are one week long, and one week without
/prog/ can be a blessing.
Certain user-agent strings (including the default ones of many common HTTP libraries) will grant you an error, but no ban. I don't remember if it checks other headers.
Setting the form fields incorrectly will autoban you. When in doubt, just check what your browser is sending through the wire and replicate that exactly. It's fairly easy.