we just finished that stage!
I was trying to potty train my son and he rufused... so I left his underware off, I then found him skating on our wood floors in his poo! needless to say the diapers went back on until the power struggle was over. He is finally to a point where he's happy and I'm asking him again if he's ready to try going on the potty. we'll see what happens tomorrow actually. (he'll be 3 on valentines day)
HOWEVER... about six months ago is when the playing in his poo all started.. I can't tell you how many times we've cleaned up poo on the walls, carpet, floor and all over him too. (he was 2 1/2)
We told him No, and that he needed to tell us when he went poop in his pants. after constant showers and telling him it was gross it subsided. (Maybe tho becuase our three year old was on poop alert every time, it seemed she was tired of him playing in it too, she became an anouncer of Leo's poop!)
but the playing came back during the forced potty training
*( we only forced him because it seemed as tho everything was a power struggle and when he was with my mom he potty trained himiself without any prompting, spending the night, so I figured he was ready... little did I know he was ready for a fight)
Moral to the story.. keep telling him it's not okay, duct tape his diapers on, and give him a shower each time it happens.. and invest in lysol... (or a green version for us)