Amusing header middleware for your Connect/Express project. Should be easily portable to other languages.

amusingheaders.js

app.use(function (req, res, next) {

  function atRandom (opt) {
    var selected = Math.floor(Math.random()*(opt.length));
    return opt[selected];
  }

  //amusing headers
  var servers = [
    'Apache',
    'nginx',
    'lighttpd',
    'IIS',
    'Unicorn',
    'Mono',
    '\'); DROP TABLE servers'
  ];
  var langs = [
    'PHP',
    'Ruby',
    'SQL',
    'Node.js',
    'COBOL',
    'Assembly',
    'Python',
    'Brainfuck',
    'HQ9+',
    '\'); DROP TABLE x-powered-by',
    'ASP.NET',
    'Visual Basic 2006',
    'Java'
  ];

  res.header('Server', atRandom(servers));
  res.header('X-Powered-By', atRandom(langs));

  next();
});