I am not seeing any sign (e.g. this guy

) to indicate that you are joking. Put a bib on me because I must be a big baby in your eyes, as is every other person that I've ever eaten with or in the vicinity of

. If I noticed someone breaking their bread into small pieces and then buttering each little piece, I wouldn't think they were "infantilized", but I would think it was bizarre even if it is some kind of ancient bit of dining etiquette. It just strikes me as really strange that that would be anyone's biggest dining pet peeve

.
Mine would be undertipping when the service is at least good, and double-dipping in a shared bowl of dip, sauce, oil, etc.