So, in case you were wondering, it is not effective parenting to forget that the child is in timeout.
Neither is it especially effective to place him in timeout near the bathroom, or specifically near the temptation of the toilet paper roll.
This is what happens.
He doesn't look especially pensive, reflective, repentent, or thoughtful regarding his offensive actions.
And I suppose it is also not effective to take pictures before calling a halt to the toilet paper party, only then explaining that this is not acceptable (but now well documented).
But I had to.