Wanted Players Ads
I'm not sure that would be fair, really. There's an aspect of the GM having so much more control of the game (obviously, because they own and run it) that I think /should/ give the players the ability to determine whether or not they think/feel the GM is trustworthy, or flighty, or anything else they can extrapolate from the statistics listing a GM's games.
A GM that constantly opens games, gets 100 posts in, and then bails is wasting players' time every bit as much as a player that quits wastes their GM's time. The GM's time is not more valuable than the Player's. The difference is: Players that get 100 posts in are replaceable. GMs are not. I can understand why people want to know whether or not a GM has a habit of starting and stopping games before they commit to joining one. Equally, yes, I understand why GMs want to know if players are flighty...but again, players are replaceable. GMs are not.
A player that quits because they got bored can't shut the game down for everyone. A GM that gets bored can. Yes, I understand that not every game gets deleted because the GM got bored, but it's a pretty safe bet that if you see a list of thirty deleted games with only a handful of posts tagged to a GM, it's not /all/ because of a technical glitch or circumstances out of their control.
/shrug
Admittedly, even if the Players-Wanted Ad /didn't/ list a GM's games, prospective players can always look them up via the Game Search, anyway. People that care about that information are probably going to do that, and those that don't care probably don't pay attention to the list of games at the bottom of an Ad in the first place. Removing the list from the Ads won't hide the information.