annoyissist
Annoyissist: person with inordinate fascination with annoying others with pictures of oneself; has excessive love of irritating others through photos, especially by leaving pictures of oneself on unsuspecting people’s cameras/phones/recording equipment or by photobombing.
Damn it, did I leave my phone out?!? I’ve got another picture of that annoyissist Seth as my wallpaper again! At least it isn’t a picture of his armpit this time.