any such actions would simply encourage the CDers to abandon their less than 100

account and start a new one.
Which would make it harder to track them and see how likely someone is to CD in the first place.
Private games with people you know from the forums is one good option. Though i know a lot of newer players will take a while to become known (and our pool of players will be slow to increase) but we all had to start somewhere...
if you're playing a public game and somebody CDs, you can ask a mod to force pause the game while you look for a replacement, or have the other players vote to cancel/draw and start a new game with the same players... (it's always good to get to know your enemy and then play again against them, it helps test your diplomacy...)