First, sorry, I accidentally wrote a book.
Second, here it is:
Here's a theory: Robz is a Serial Killer.
He comes straight out of the blocks saying "Don't vig!", knowing of course that there will be at least one extra night-kill each night, and then he can act indignant each morning because some Vigilante isn't toeing the line. "Why do you keep killing our Townies?" he demands. "I told you not to vig!" Meanwhile he looks very Town because he warned us all that this was going to happen, but someone didn't listen.
Having said that, I actually think he's probably Town, although I don't have any stronger reads so he's still my number 1 suspect.
oh i'm going to like playing with you
this is exactly the type of theory i like 
I totally agree with cayvie, this is super interesting. Also interesting is robz' offhanded response to the accusation. All game robz has been telling us he's town, telling us "the best" way to play, and, dare I say, being real warm and fuzzy. In his first response to me (post #92) he first tells me he’s super experienced (damn, boy) and then answers my question all the while insinuating he’s town. The part that felt most awkward to me was this:
Since you are the Innocent Child I can't really bounce my thoughts on whether people are playing to their town or scum "meta" off on you, because you don't know--you've never played with these people.
In post #98 he advocates lynching all lurkers and goes on to have the highest post count thereby keeping himself safe from lynch, at least for lurking. (I understand this is a popular idea but I don’t know that it really holds water anymore. More on that later if necessary/requested.)
The fish for a cop or doctor in #100 has been discussed by…dang, a bunch of you? But Robz response to being called out for it is borderline cocky and he again all but says “I’m town! I’m town!” by this (#192):
This is actually a pretty good reason to vote for me. I salute Frisk for catching it.
It's also something I would have obviously self-filtered if I were scum.
And again! Warm, fuzzy, semi-condescending, look-how-town-I-am Robz.
Well, here goes some more buddying, but that's a genius suggestion. Seriously impressive. Not the case though, sadly.
All that horrible quoting aside, I have to put what faith I can into Galzria’s post (#225) about how that was old scum Robz, not new-scum Robz. I am not ready to vote but I am looking longingly at that Robz wagon.
I think it would be AMAZING to hear words from people like Lekkit and Abra…speak up, boys.
