I think a 30 mins ban for first time dodge is too harsh.
I dont agree with the OP and his reasoning... but really, there are some people out there that you are unfortunately matched up with which are just there to grieve their allies. These are the moments where dodging should not be frowned upon.
1st Dodge ban time: 15 mins
2nd dodge ban time: 30 - 40 mins
Plus, I dont think this 30 min ban time has dealt with the situation. To me, it seems like the easy way out. Who's stopping people from making a smurf account for the time they are banned in their main account after a dodge?