Someone whose questionable actions cause you to learn an important lesson and then they pretend it was their plan to enlighten you all along.
(South Park) While Stan's ploy to distract others from his own dishonesty inadvertently led to people taking up a positive cause, his "that was really my plan all along" attitude cemented his reputation as a Sneaky Butthole.
(Arrested Development) George Senior's use of Sneaky Butthole tactics to teach his children life lessons may have traumatized them, but they sure didn't forget to leave a note on the fridge again. Ever.
When you get someone (friend, sibling, child, pet, etc.) to pose in a picture with you so that it does not appear to be a "selfie". But, the purpose is still to take a photo of yourself for social media.
"Look at John. Posted another pic of him and his dog. He's a sneaky selfie addict!"
"Little Jonny..come here and get next your Mommy so I can take a picture of myself for Facebook." Mommy is taking a sneaky selfie.