Yeah like a smaller area isn't going to cause more accidents. 'Oh sorry honey I didn't mean to punch you in the eye it was an accident' XD
To play 2 players with kinect takes loads of space just because 2 people playing need loads of space. However one thing this may help is the distance you need to stand away from the sensor (which is just a load of wasted empty space.)
On one hand this looks like it could be helpful. on the other it also looks like a cheap bit of rubbish made be people who sell plastic tennis rackets that clip on to wiimotes!
I really have a tiny room and I always had doubts that Kinect will work. But I just recently decided to give it a try and voilá it works perfectly fine, even though I have 2 chairs in the background/at the side. I never thought it would work, but I have
absolutely no trouble. I can only play alone though. But better than nothing.