The sole purpose of my existence is to disprove this theory. 
You got my attention, I have been looking for a Government Grant for the study of some cockamamie thing, this is just perfect. No degree needed, no experience, just $150,000 to visit the homes of criminals and check out if they wash their dishes or clean the stove.
Unfortunately as I found out years ago from a woman that lived in a ghetto that the welfare cheats found out that when when social workers showed up in the neighborhood the worse cheats and drug dealers kept their residences squeaky clean. When Inspectors walked into a well ordered home they turned around and walked out, the dishes were washed, beds made, " no problem here".
It is because we equate order and appearance with good that we expect to find no wrong doing. This does not as most of us think come from the Bible, Cleanliness is next to Godliness. Someone in the 1800 said it and don't we get into trouble for believing that.
Perhaps I could get a government grant to prove one cannot tell a book by its cover.