JK hasn't been around since the start of D0.
Hi.
Sorry, I've had a long couple of days, so I guess you could say I've been cooped up in my room.
Those Pokemon don't catch themselves!
Hey guys remember when we actually used day 0?
You mean, never?

The fire always begins after the first night. That's why I wish we just regulate Day 0's to be a short, 24 hour unlynchable period so everyone at least gets a chance to respond/throw around some jokes.
Because the true first day is when things start to get serious.
But on to Ender's questions---
I think the answer is obvious: the zombie faction is the "real" threat of this season; in fact they're even its namesake! Of course, if we were/are lucky(which... most of the time we really aren't in these games, source: killing/finding the cop dead so many times on the first day), then they could randomly just be wiped out and we'd be back to a normal round of Town vs. Mafia.
...But since that has not happened yet it has to be them that I feel like are the most dangerous, as they get stronger as time goes on, and can just as easily hide under the radar as a faction until its too late. Plus, if how I've interpreted their abilities in the signup thread is how their ability actually works (in terms of the Zombie leader), then depending on if the visited person was mafia or not, then its either a conversion to the faction or a kill.
I'm probably wrong and the leader has to choose to convert or kill for the action that night but since their targeting will be indiscriminate anyways they're still quite dangerous, and I don't want to see them grow too powerful before its too late.
why are people acting like keeping their suspicions to themselves is a good idea
Easy, because sometimes it is a good idea--- depending on what you're role is of course. Keeping a closed suspicion could be used to draw someone into a trap, wether you're a townie or anti-townie pr role.

Plus sometimes it can also lead to unncessary confusion or suspicion to lead to a mislynch. Lots of reasons; its up to the players discretion on what they should do.
Plus who's said this outside of Oak? This feels like the jumping-the-shark claim Vatu did earlier. Besides him the only thing i've seen is people who have said their suspicions and those who have said they don't really have any right now. I don't see what the deal is there.
BUT... for my suspicions. I'll say Mars and Vatu.
I won't say my reasoning for Mars (because it's most likely dumb) and Vatu for the stuff said earlier which felt unfounded and unhelpful, especially toward pushing the town forward for a lynching choice.
And in terms of the Oracle and Lonely Survivor...
Oracle is probably just either the Epicmafia or Werewolf equivalent, except third-party rather than explicitly apart of the town.
Lonely Survivor... I feel like is just a survivor. Honestly the name just makes me think of that one indie game from a few years back:
http://lonesurvivor.co.uk
Coincidentally, that had weird zombie creatures in it too. So im gonna say probably has some kinda hidden zombie mechanics because of that.

Like with whoever had the idea that they "hide" from being infected.