[Spitty]

The smug superiority of our OP here is just hilarious.

Blacklisting? Really? The fuck do you bring to the table that's so overwhelmingly good that you think blacklisting someone actually has any impact?

Pro tip, it doesn't. You're only screwing yourself over, and it's as much your fault for not communicating clearly as it is theirs for suddenly bailing on a group.

Look, at some point you need to take responsibility for your situation. Don't want people leaving without warning? Make that clear up front. Form your own group and tell people "hey, do you have a few hours to play?" If the answer is no, decide if it's worth it to you to risk that person leaving mid-camp.

If you come across a player that bailed on a group and he wants in on your camp, man up and call that person out. A little "last time you left suddenly, are you gonna do that again?" goes a long way. You might find out that person has a sick kid in the other room and your orc experience may have to take a backseat to strep throat. This shit happens.

These really aren't hard things to do, unless you're so incredibly arrogant that the slightest mis-step in your master plan causes you to lose your shit and freak out. Keep calm and regroup.