When you publish something on the Web, it's great to receive
thoughtful feedback from readers; there's no faster or better way to
find and fix everything from typos to yawning logical chasms in your
argumentation than to submit your work to the global peer review
which the Internet enables. What's not great are the
consequences of publishing your E-mail address on a Web page to
invite such feedback. Should you be so unwise, you'll quickly
discover what it's like to leave your door unlocked in today's
Internet slum. FeedbackForm is a CGI
application, written in the Perl language, which allows visitors to
your Web pages to send feedback identifying the page from which
it was sent, without ever disclosing your E-mail address. To avoid
ruminations of robots and memos from morons, submitters are asked
to solve a simple linear equation in order to have their feedback
transmitted. Trusted correspondents can be added to a white list,
and may send feedback without solving a problem. You can configure
the difficulty of the problem the user must solve (or disable it
entirely, if you dare).