C.B.
It sounds to me like this is a case of flat-out defiance. I would put a diaper back on him and make him go back to doing things like a baby. For example, I would not let him go out in the backyard to play nor would I take him ANYWHERE at all. When he asks, tell him that you would like to take him or let him go out to play, but it appears that he's still a baby and babies don't get to do those things so you're really sorry, but until he acts like a big boy, he won't be able to do those things. don't make a big deal out of it and don't warn him ahead of time; just when the situation presents itself, tell him. That way, it makes it his decision - either act like a big boy and quit peeing everywhere or wear a diaper and be a baby. I would put the diaper on using duct tape if you have to do he's not able to get it off.