We have one of each. Trooper Thorn is docked, but BeBop's breeder never got around to it. To be honest, if I had a choice, I would prefer them both docked. Bebop has knocked over his share of coffee table items, and yes it is like a little whip when he shakes or wags too hard.
BUT!!!
I do love that we can actually hear him thump his tail. He is such a happy, loving dog, and sometimes when his tail is under the dresser, we hear it beat double time as it hits the bottom of the dresser and the floor. Plus, Bebop is actually one of the only dogs I know that chases his tail. It is hysterical! Picture the fastest boxer burn you have ever seen, and then, picture it being done in a 2 foot circle!!
You can kind of see his tail in my photo gallery in the "Howly Jowly Christmas" pic & "BeBop's first night home". I'll try to get a better on with his tail up and unfurled.
Don't worry about your pup. BeBop has never had a problem with it, and he has put some serious butt wagging abuse on it!