You're the one who tacked on the reasoning that he had become irresponsible.
As the group approached the area, climbers could be seen, bright colored flies tacked on a wall of ice.
Up the gorge, there were no climbers tacked to the icy walls.
The ships at the head of the English line at last tacked to the support of the centre, and at evening De Ruyter drew off.
She tacked the note to the door and shut the screen.
After the skins have been carefully removed - the sooner after death the better for the subsequent condition of the fur - they are lightly tacked out, pelt outwards, and, without being exposed to the sun or close contact with a fire, allowed to dry in a hut or shady place where there is some warmth or movement of air.
The prevailing views are tacked on, as it were, to the essential doctrines of Buddhism, without being thoroughly assimilated to them, or logically incorporated with them.
But following a custom which was by no means uncommon in the middle ages, a clumsy sequel, extending to 1516, was formed out of various chronicles and tacked on to his work.
The one I tacked on your door before I left.