Yeah, he must be making a joke, but what is confusing about his sense of humor is that he will embed his "jokes" (and sometimes I think his accusation that I'm a "stalker" is entirely a joke) in with real complaints, or at least appear to be serious complaints. I'm assuming his complaint about Eric emailing his firm, for example, is quite serious. So when he "jokes" about me in the same breath as he complains about Eric emailing his firm, who knows what's going on. And is he joking about Eric calling him a child molester? If so, what a bizarre sense of humor.
It is unfortunate that Eric essentially outed himself to Bob and Dan and then they went on a mission to harass him and inflict harm in his real life. Certainly Bob intentionally provokes and harasses Eric on this M.B and intended to do so in his real life when he attempted to email the dad. Eric's original post which sparked this debacle was little more than personal philosophical musings about why would a God inflict disease and shouldn't one wonder about that as opposed to assuming that prayers, or religious rituals are what effectively makes a person recover. And that philosophical musing he applied to his dad's behavior.
So Bob does mix up joking with being serious. Essentially he wants to entertain himself with manipulating people, mock this board to some extent and at the same time he wants to seriously harass some, such as Eric, in spiteful ways. I don't know what his motivation for harassing Eric is. Bob has been the instigator and provocateur and Eric has retaliated. Eric had no motive to go after Bob, it was only in response to Bob that he has done any harassment of him in return.