Now that Joel had to be the grown-up and spoil the fun, here's what the home page looked like:
How is this any different than posting a bunch of unicode spaces in the post body? Or other general abuse of the system?
The short answer is "don't do that", and the longer answer is "if you keep doing that, there will be consequences."
edit: I added the zero-width non-joiner to our length check routine. You'll have to move on to other more obscure unicodez.
In order to reproduce this, just use
‌ enough times to beat the minimum length filter. I even have it above this text.
You can also type
Alt+200B in a text field.