[hermitdev]

Yeah, in other words: it's not intended to hold up to scrutiny, just hold up to a glance.

[Phrodo_00]

I don't get this line of thinking. Nowhere does it says it's supposed to have any security uses.

[DonHopkins]

It's quintessential security theater.

[dhosek]

Rot13 hasn't been a serious encoding scheme for security since the Roman Empire. It's all about making an easy to encode/decode wrapper for hiding spoilers and the like. Back in the olden days, newsreaders had a shortcut key to run rot13 on the text of a post so you could unveil the spoiler or puzzle solution.