How Smart is Your Front Facing Camera Compared to a Mirror

Pic of phone taking a selfie- Note the mirrored writing.

Selfie. Note the writing doesn't look mirrored.

Selfie with writing that was written mirrored to begin with.

When taking a pic with a front facing camera, the image shown on your screen is mirrored. But once you take the picture, it flips it around.

How can you use this knowledge to annoy your less-intelligent friends and run amok? I'll let you think on that. But please, if it ends up as a meme, let me know.