As a GM I usually have a habit of trying to PM people. Though I only get more pissed when they don't respond; as had happened in my last mass-reminder PM when only one guy responded that he's busy with other things.

On a similar vein I've sent a PM to a mod and GM of an RP asking them to come back and settle up some applications and a concern I raised, but I don't think I ever got recognition for that. I don't know if it's just that some people fail to notice them sometime or they simply stopped caring and don't want to bring recognition to their failures by not acknowledging their disappearance. But this is a Free RP role play, so I shouldn't expect anything more; I just simply go there so I have something to crack my knuckles over while I wait for posts in my other RPs.

But still, if you're obviously going to still be around the least you could do is come by and say you're dropping something. I know that irritation all to well.