41

Using only a zero-width non-joiner, and maybe other characters, allows unclickable titles.

Now that Joel had to be the grown-up and spoil the fun, here's what the home page looked like:

screenshot

26
  • 22
    I love the elegance of this bug report. So... self-referential.
    – fbrereto
    Mar 25, 2010 at 17:15
  • 1
    I think it's hilarious that there isn't even anything to click on to get to this question from the Questions page. Mar 25, 2010 at 17:15
  • Actually, it doesn't explain how to reproduce the bug. If I edit, the title is literally blank.
    – user27414
    Mar 25, 2010 at 17:16
  • @gnovice the expert: That's why I edited the number in.
    – balpha StaffMod
    Mar 25, 2010 at 17:17
  • @Jon B: Actually, no, it's not.
    – balpha StaffMod
    Mar 25, 2010 at 17:17
  • If you normally browse the homepage instead of the Questions page, there's a usable link on there to get to the question.
    – Jon Seigel
    Mar 25, 2010 at 17:18
  • @balpha - I'm looking at it in the edit page, and it's blank (using Chrome).
    – user27414
    Mar 25, 2010 at 17:18
  • 1
    @Jon use 'View Source' and see the data inside of the value. Mar 25, 2010 at 17:18
  • It is basically ||||||||||||||||||||||||||||||||||||||||||||||| @balpha could you explain why this works? Mar 25, 2010 at 17:20
  • 2
    See also: meta.stackexchange.com/questions/10519/…
    – Welbog
    Mar 25, 2010 at 17:23
  • @NlfE: I guess Jeff forgot about titles. And probably tags, too.
    – Jon Seigel
    Mar 25, 2010 at 17:25
  • 1
    @Jon Seigel: No, it doesn't work with tags. The character white list for tags is very restrictive.
    – balpha StaffMod
    Mar 25, 2010 at 17:27
  • 2
    @Joel - aw, spoilsport! ;-P
    – Pollyanna
    Mar 25, 2010 at 17:34
  • 2
    @Joel: BOOOOOO!
    – user27414
    Mar 25, 2010 at 17:34
  • 3
    @Downvoter: That must be display issue on your side then; your comment is just blank to me.
    – balpha StaffMod
    Mar 25, 2010 at 17:50

3 Answers 3

19

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.

7
  • 21
    That's an utterly boring answer. But since I tend to give the check mark to the official response, there you go.
    – balpha StaffMod
    Mar 26, 2010 at 5:57
  • 2
    @balpha you know what else is boring? Unicode spaces. I'm just sayin Mar 26, 2010 at 6:09
  • 41
    Yeah yeah yeah. Why don't you two get a room, you and ASCII.
    – balpha StaffMod
    Mar 26, 2010 at 6:36
  • 4
    Unixode is not an abuse of the system. It merely shows that the system is underspecked.
    – tchrist
    Jun 3, 2011 at 22:57
  • 1
    ​​​​​​​​​​​​​​​​
    – WendiKidd
    Sep 6, 2013 at 22:30
  • ^ Methinks this is still broken, though how important that is, I don't know.
    – WendiKidd
    Sep 6, 2013 at 22:31
  • @wendi technically this is about Post TITLES, per the question. Sep 6, 2013 at 23:09
18

‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌

5
  • How about user names?
    – Pekka
    Mar 25, 2010 at 17:28
  • 1
    I tried that once.
    – Welbog
    Mar 25, 2010 at 17:31
  • 17
    I have an account I use with a blank username that posts blank questions, blank answers, and blank comments. My posts are everywhere - and nowhere.
    – user27414
    Mar 25, 2010 at 17:36
  • 5
    @Jon B: I feel like you're playing a game of Mad Libs with us. I pick the adjectives "smelly", "green", "wooden", and "effervescent". Mar 25, 2010 at 17:42
  • 2
    @gnov - I do try to post effervescent comments...
    – user27414
    Mar 25, 2010 at 17:43
2

‌‌‌‌‌‌‌‌‌

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.

3
  • But that shows it in the source
    – juan
    Mar 25, 2010 at 17:47
  • Yes. The character map method does as well. Mar 25, 2010 at 17:48
  • 4
    let me try on my Linux workstation: fail. Oh, no worries, I've got a Mac too, let me try again... fail. Alt+200B. Sure thing. Mar 25, 2010 at 21:12

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