Was that Joe though? Nope. Len was an awful person, and look what happened to him.
NOW, I have considered that maybe, just maybe, Joe planted the other half of the rabbit in Daryl's bag (to frame Len and have the group kill him, in order to gain Daryl's trust). The only problem with that theory is, why would Joe do that? I know the point of this is to test Daryl's character, that's what this marauder story provides. From Joe's perspective though, what does Daryl's inclusion help Joe gain? I mean, let's face it, if Joe is some unstable, maniacal, rapist guy, he should have lost his **** when this stranger (Daryl) bashed him hard in the face with his cross bow (and taken said cross bow). But no, instead he gives Daryl several chances, doesn't beat nor talk down to him and welcomes with open arms. He even seems disappointed when Daryl states (several times), that Daryl is going to go off on his own.
Like I said, who knows. I hate this "GOOD" vs. "EVIL" concept though. It's not always so clear cut. It goes back to Shane for me. He was considered an antagonist, technically, but I never really considered him "bad" per se. Maybe it's just me, but I like when these stories go to "morally grey" places. It's what a survival show should be about. Now, you guys are probably right. Next week, Joe will probably do something despicable. As far as Claimed goes though, I saw nothing terribly troubling. Even the whole "fall together" ideal he has about this world.