I was accusing others for being insincere, not narcissistic. Guess you've read only the quoted part of my message, hope the reason is not some sticker on the inside blocking the view.
You were accusing them of being both. Now who is being insincere?
Honestly, the compulsion to accuse others of narcissism for something as harmless as putting stickers on their personal property screams "LOOK AT ME, I'M SPECIAL" much more.