It comes in handy when you're pretending to run a respectable blogsite, but in fact get much of your material from wingnuts like Trevor Loudon.
If you're going to use it properly, here are some tips:
- never express outrage over the behaviour you wish to draw your followers' attention towards. Use words like "interesting". The pack will do the rest
- if called by someone for your whistling, make sure you take umbrage at the allegation. "Who me? I would never do such a thing!"
- it helps not to have a moderation policy. That way people can say what they like, and you can just shrug your shoulders and say "that's freedom of speech for you!"