[indexerror]

Well it was an 'Open Secret' outside of Meta as well, wasn't it?

[watwut]

I would just call it open. No secret part applies at all.

[ratg13]

It’s the ‘open secret’ of the internet.

It has nothing to do with Meta.

Literally everyone can figure out that if a website asks for your age or birthday, what you can put in whatever you want.