Hey there.. I went thru the same thing with my daughter who is now 3, Now my 11 Month old son loves poop too... he keeps going to his sisters lil potty and getting into it.... I have put it into the bathroom and try to keep the door shut but you know how life goes... you cant sit by the door 24/7 to watch to make sure they dont open the door... I have actually made some funny "poopy" layouts.. with journaling... but I'm not sure if we are aloud to upload that kind of material.. etc.
Have a good day..
p.s. I had to keep onsies on my daughter until she was two... and YES we have actually done duct tape. it comes in all colors at home depot..