I know it's been a pretty big problem in my clan recently, and I'm sure it's not just mine. The problem has been people donating things like goblins when level 6 balloons are what was requested. This happened to me five times just today, and I haven't been able to see who has been doing it. Donations have always been something the clan requires members to keep at least half as high as their requested troops. I received 40 unwanted troops just today. When I finally got the troops I needed, my donations were way off.
I talked to my clan about our problem and we came up with a pretty solid fix. Our idea is to have a feature within the clan chat, like the changing clan settings feature, that would display a chat message when someone donates with what they donated and to whom. This would completely eliminate the problem. My clan would be able to see who was donating even when we weren't on to see it happen. We would then be able to kick the members that are donating unwanted troops.

