Figured I'd offer my two cents on this, as I've known Marc for about eight years or so. I just made an account today (I thought I had one, but I guess not).
Anyway, the biggest gripe, it seems, is that Marc stiffed some guy out of $3.8k. Now, it doesn't matter if this guy is Mussolini or Charles Manson. If he's owed around $4k and doesn't ever want to talk to Marc again, he should get his $4k on the spot. I think everyone agrees with this.
However, despite what a bunch of forensic linguistics experts are saying about ellipses and whatnot, how is that definitive proof of anything? The anonymous guy won't provide any details as far as name, club or account. Sure, he may have some reasons for not wanting to do that publicly, but that makes things impossible to corroborate. So if we assume Marc is this monster, then why wouldn't this guy provide even just a few details so the people running the club can contact Marc and get this squared away? Am I missing something obvious here?
Other stuff: Seems the $1k owed to Jake was resolved.
I'm not sure about the angling in that big hand and versus the Asian dude. But is Marc really that intoxicating a personality that he'd have everyone in the poker room in his back pocket like that? As I said above, I've been his friend for a while, so I'm going to have some bias, but at the very least it sounds like this is not a cut-and-dried angle.
Other stuff pt. 2 (man, there's a lot here!): I don't know Vinny personally, but I've heard some horror stories about the guy. Scamming someone like that out of $25 doesn't seem like a big deal to me. Sure, scamming anyone isn't honorable, but it's not like this is some standup dude.
And regarding the hotel room, I actually asked Marc about this. He sent the following screengrabs (which hopefully I didn't horribly botch when uploading them):