There was a disucssion on this a while back.
http://www.conquerclub.com/forum/viewtopic.php?f=59&t=45126. If you believe the reply, there is a bot or script or something floating around, but not publicly available.
Alas, I am one of those people who you really piss off when stopping in the middle of a freestyle game to get a strategic "other guys away" advantage. If you need time to strategize, eat, get busy with the GF, whatever, that's all legit. But it's dishonorable play to jump off a freestyle game and then come back looking for the other guy to be offline once you start going blow for blow. Obviously if everyone could play sequential but trick the site into giving them first move every time, that'd be cheating. This type of play is just using a loophole to achieve the same result. If I could get my hands on a script/bot/whatever, I'd use it in situations where the person takes more than a reasonable time to initiate the next round. The potential for abuse is obviously great, however, so I guess we can only wish.
Also, I'd seriously think you need some negs for playing like a little girl if you try to call a time out and then run home to base. If you've got any guts, honorable play is to post a chat of when +/- 10 minutes, you'll be back, or at least say you've got to go so the other guy isn't sitting there wasting 20 minutes of his life wonderring if you just went to take are really big BM or you actually had other things to do, but clearly I'm in the minority on this one
http://www.conquerclub.com/forum/viewtopic.php?f=6&t=49878&start=0&st=0&sk=t&sd=a&view=viewpoll 