I really love playing ghouls. This has meant that I've had to deal with dropped regnants a few times. This is not usually a problem you can go to staff with per se since it's not important (though I'm glad to see that finally a lot of vamp places do have house rules to allow ghouls some degree of OOC agency to remove/switch up regnants in the case of someone going AWOL) in a mush sense. What I usually do is wait whatever the idle-freeze time period is if the person has suddenly stopped logging in, and when they roll over contact staff to tell them my proposed solution, get their buy in along with whatever adjustments they propose. If I have contact info for the AWOL player I'll try to contact them weekly until that point--not in a bitchy or whiny way. Once the idle timestamp has been applied, I always send them the pitch I made to staff. If I don't have off mush contact info I send it in a @mail shortly before they roll over so that when/if their RL is such they can return, they'll be able to see what the pitch was. And then I move on, and if they return, I'm friendly--maybe we work it out to continue, most of the time not, but hopefully no one has been disparaged except for actions that THEY wrote and took prior to their departure.
Poor BobGoblin's situation though is...I mean, at least with someone who drops off the game, you don't have the kind of meanness that is ignoring someone or putting them off without the courage to say "I'm not interested." That's a shitty thing to do to someone. Even if you don't have a close tie in. If you don't plan to RP with someone, just tell them and then offer to work things out OOCly. I don't alt-stalk, so it's possible that I might have been in this situation too but was just unaware. I think think I'd be a lot more pissed if I knew someone was being a cowardly dick and wasting my time and theirs.
So in that case, I still would not involve other PCs in things--that's awkwardness on a lot of levels, as I said previously. But I would definitely after a month (or whatever the games idle policy is, whatever's longer) send a @mail and then +Request if the mail was not responded to stating that I'd tried for X amount of time to get scenes with no response, while the other player was active otherwise, and that I wasn't sure why--at that point /I/ was uncomfortable needing action on their part to advance my story, that I did not hold any grudges or anything, but I'd like the proposed resolution of XYZ (something face saving for both PCs) so that we could move on and not have any further obligation to each other unless we both agreed to it organically sometime in the future.