First of all, Guilty Feat is a pun. It’s not a very good one and it doesn’t mean very much. If you don’t like it, I can’t promise you’ll like what’s inside any better.
Secondly, Guilty Feat is a description of the things I will write about here. Things in which I take dubious pride.
Storing my books in alphabetical order by author (and by chronological/series order within a single author) is a guilty feat.
Knowing all the lyrics to “Careless Whisper” is a guilty feat.