Purple: I understand your frustruation. I like it for the times like when I was unable to log on due to cable access trouble in my area because of some construction going on, so it did enable me to keep some of my games going. But I know some people abuse it, and that's frustruating for everyone, especially a pawn who had limits on tournaments.
But as a result of my using autovacation to prevent timeouts, my vacation days are used up- so I have to think that it's one vacation day for every game it's used on. So opponents shouldn't be able to keep prolonging the games with it. They will time out if they don't move the game I think.

I hope this answers your question Tarantino Fan, you can read the section about autovaction in the help menu