I think it's in Hannibal where in a conversation between Clarisse and Barney the orderly from where Lecter was incarcerated during Silence of the Lambs that one of them remarks that he said that whenever possible he prefers to eat "free range rude."

Interesting … it is rather easy to be more polite than the background environment of options.

Or people whom it's otherwise a public service of sorts to remove, like a bad member of an orchestra. Otherwise I can't think of any of his victims who weren't in some way a threat to him. I didn't watch the series, though.