Playing with a guilty conscience....

Just like children, anyone with a guilty conscience can easily be goaded into a.) realize that you know they're guilty, b.) con them into admitting their wrongdoing, c.) pick a fight, d.) make the wrong-doer look idiotic or e.) one or more or even ALL of the above.
It's easy and fun to pluck at the strings of a heart (if they even have one) heavy with guilt and even more fun to lay on more weight before making squish with the guilty conscience. For those lacking a heart or a conscience all together, makes for an interesting battle, but in the end, human nature makes even the mightiest fall... It's called "ego". And squishing ego is most satisfying .
The effect may not be tangible to the one stirring the pot, but the effect is not for the chef. It's the one who is served that has to deal with all of that. That's the goal. Another hobby of mine... Fine! It's a quirk... Whatever.