Great podcast, as usual.
It's slightly off topic, but listening to this episode, I began coming up with an Alohomora drinking game in my head. I'll have to try it once I'm not pregnant anymore. The rule that jumped out at me this episode was, "Everytime Noah mentions he's an English major, Drink!" I also think there could be some fun with "Desk Pig" and "Is It Alive" references or "Obligatory Genius Moment" but I'm pretty sure someone could die from alcohol poisoning with those. Perhaps this is better off a butterbeer drinking game.

Now, to the real business.
About my comments on Errol...
I have absolutely no specific quotes to back up my thoughts there. It could be 100% projection based on what I know about Hedwig's personality and my understanding of the elderly men in my life. I appreciate the comments @Firebolt made about the fun of books pushing your imagination to fill in the blanks. I will be on the lookout for more tidbits about Errol as we move forward, though, because there's every chance I'm not clever enough to come up with something that rings true with others.
About ugly=evil...
I love the Mad-Eye Moody comments! @Firebolt again! and @saiyangirl (Although he was technically a disguised death eater for the whole first book that we knew him...) Another good point that came up in the discussion last week that wasn't mentioned on the podcast was that Voldemort didn't simply become ugly, he dehumanized himself. I think Voldemort is his own category in this discussion.
Voldemort and his evil choices...
I think that because Voldemort was the result of a loveless union (because of the potion - shout out @throughthetrapdoor for that gem of a reminder), he was likely born with a greater capacity for evil than the average person. The fact that his mother died meant that there wasn't anyone who loved him to teach him how to make good choices. I think he began making choices to act on his evil impulses from a very young age (torturing animals and fellow orphans). It's sad, because I think he had the ability at one point in his early life to deny his evil impulses, but he made a choice early on, with little to no guidance, to become evil. I feel like he maybe didn't even realize he was choosing evil, instead thinking he was choosing power or control. So, I don't think he became more evil as he got older, I just think he got better at it. His skill level and opportunity increased, but at his core, I think Voldemort was still the lonely little boy that just wants some kind of control over his life.
About Mrs. Figg...
If the whole ministry, including Fudge, were looking out for Harry since Sirius escaped, I'm sure someone told Mrs. Figg to keep a close eye on the Dursley home. Plus, I'm sure Aunt Marge being blown up was the talk of the neighborhood until everyone's memories are modified. (I may be thinking of the movie, where she floats away like a balloon. I can't remember if the book specifies how public this incident was.)
Would Harry be expelled?
Couldn't they check his wand to see if he cast a blow up spell on Aunt Marge? I don't think Harry used his wand at that point. It was that nonverbal, underage, Hulk-smash kind of rage magic, and I think that would be forgivable in the eyes of the ministry. Perhaps he'd still get some kind of warning, but I think they'd investigate the whole situation and ultimately not expel him. Maybe he'd start the year with detentions, though.
Sirius the creeper...
I think Sirius wanted to check in on Harry, but not scare him. At this point, Sirius doesn't even know how much Harry does or does not know about the whole story. I think if Sirius had spoken to Harry, he probably would have asked "Do you know who I am?" or "What have you heard about me?" Plus, if Sirius expected Harry to be anything like James, he may have been expecting to be attacked if he showed his face.
As for What If Harry Were in the Orphanage...
I think he would have had friends and grown up more like a regular kid. Sure he'd be lonely, but more in a "little orphan Annie" way than a "Voldemort hurting animals" kind of way. As to Noah's question about "What if he'd been bullied?" well, he WAS bullied! Dudley and his friends bullied Harry non-stop well into his teens. I don't think similar bullying at the orphanage would have caused Harry to turn evil. Despite all of their abuse (however you choose to define it), I think Harry had a sense that the Dursleys would always have a place for him, even if it was miserable (at least at this point in the story). I'm not sure if he would have felt any sense of home at the orphanage.
Sorry for the awfully long comment. This episode was really thought-provoking! Eric was great, and it was nice to hear Noah rethinking some of his previous opinions. (Not that his previous opinions were bad, it's just been rare to hear Noah change his mind in light of the conversation. I like seeing that I'm not the only one being shaped by this discussion.)