Of course, being a programmer I can post a huge wordlist and see which words get filtered, but also being polite I thought I'd better ask
As the great, late, George Carlin would say, <span style='color:blue' title='I'm naughty, are you naughty?'>smurf</span> <span style='color:blue' title='I'm naughty, are you naughty?'>smurf</span> <span style='color:blue' title='I'm naughty, are you naughty?'>smurf</span> <span style='color:blue' title='I'm naughty, are you naughty?'>smurf</span> (uncaught smurf) (uncaught smurf) <span style='color:blue' title='I'm naughty, are you naughty?'>smurf</span> tits